Suunto Blog

You’ve just finished a long run. You’re tired, thirsty, and hungry, and your legs feel heavier than usual. If another run is on the schedule tomorrow, the questions start: How much rest do you need? What helps you recover? And how do you know when you’re ready to run again? Running recovery after a long run goes beyond waiting for soreness to fade. It means rehydrating, refueling, making time for rest and sleep, and adjusting your next run based on how you feel. Here’s how to support your recovery after a long run and decide when you’re ready to go again. Table of Contents Understanding Recovery After a Long Run How to Recover After a Long Run How to Know When You’re Ready to Run Again Conclusion FAQ Understanding Recovery After a Long Run Recovery after a long run is the process of your body bouncing back from the demands of training, restoring its ability to exercise, and preparing for the next workout. It involves several processes, and they run on different timelines. What Does Your Body Need to Recover After a Long Run? After a long run, your body has to recover on several fronts: Glycogen stores: Glycogen is stored energy in your muscles and liver, and a key fuel for running. A long run draws these stores down. Eating carbohydrates helps replenish them, fueling both daily activity and your next workout. Fluids and electrolytes: When you sweat, you lose water along with electrolytes such as sodium. Replacing both helps restore fluid balance and supports normal body function. Muscle recovery: Running puts repeated stress on your muscles and can cause some muscle damage. Your muscles need time to restore full function, and getting enough protein supports muscle repair and adaptation to training. These recovery processes run on different timelines. Leg soreness may ease before the rest of your recovery is complete, so soreness alone can’t tell you whether your body has fully recovered. Why Is Recovery Important for Your Next Run? How well you recover shapes how you feel and how well your next run goes. Cut recovery short and you may start your next workout with depleted energy stores, reduced muscle function, and lingering fatigue. Energy availability may be limited. If your glycogen stores haven’t been fully replenished, you’ll have less fuel for exercise, especially in a longer or harder workout. Performance may suffer. If your muscles haven’t fully recovered, holding your usual pace or moving efficiently gets harder, and the same workout can feel tougher than normal. Fatigue may be more noticeable. Lingering physical or mental fatigue can make a workout feel more demanding, make it harder to focus, or stop you from completing the session as planned. How to Recover After a Long Run After a long run, focus on four areas of recovery: rehydrating, refueling, balancing rest and activity for the rest of the day, and getting enough sleep that night. The right approach depends on how demanding the run was, how soon you train again, and your individual needs, so your routine can flex from one long run to the next. How to Rehydrate After a Long Run Drink to thirst after your run, then keep rehydrating with meals and through the rest of the day. You can spread your intake over the day rather than drinking a large amount all at once. Replace sodium when you sweat heavily. On hot days, on longer runs, or if you’re a heavy sweater, you can replace sodium through meals or electrolyte drinks. Sodium needs vary from runner to runner, and not every runner needs salt tablets. Plan your hydration if you’re training again soon. If you have another workout later that day, thirst alone may not be enough to guide you. Even so, whether you’re drinking water or a sports drink, avoid forcing fluids just to hit a preset target. Drinking too much carries real health risks, and an electrolyte drink is no license to drink unlimited amounts. To understand how much you sweat, track changes in body weight. Compare your weight before and after runs in similar weather, on similar routes, and at similar intensities, accounting for any fluids you drink and urine you pass during the run. What to Eat After a Long Run Have a meal or snack with carbohydrates and protein after your run. Rice with eggs, fish, or tofu works well. Everyday foods cover these nutrients, so specialized sports supplements aren’t essential. Eat a regular meal if one is coming up soon. If not, start with a snack. If your next meal is a while away, try a sandwich with milk, or yogurt with oats and fruit. Low on appetite? Start with a small portion of something you can tolerate and have a full meal later. Refuel with carbohydrates promptly when your next workout is coming up soon. If you’ll be training again shortly, especially later the same day, eating carbohydrates sooner is particularly helpful. Nutrient timing matters most when recovery time between sessions is limited. When you have more time to recover, fit meals and snacks around your schedule and focus on meeting your overall nutritional needs. Balance Rest and Easy Movement Balance rest and easy movement based on how you feel after your long run. If you feel good, carry on with light daily activities or take a short walk. If you feel noticeably tired, cut back and make time to sit or lie down. Light movement is an option, not a box to tick after every long run. Treat an active cooldown as optional, not a guaranteed shortcut to recovery. If you do add low-intensity activity as an active cooldown, keep in mind that research is mixed on whether it reduces soreness, improves markers of muscle damage, or boosts performance in a later workout. Keep movement easy, and stop if you feel worse. A walk or easy bike ride should stay recovery and never turn into another workout. If you get more tired or discomfort increases, cut back or stop and rest. Prioritize Sleep After a Long Run Protect your sleep that night, and keep evening plans from pushing back your bedtime. If your long run finishes late, have a meal and shower supplies ready in advance so you have time to eat, shower, and wind down. Sleep needs vary from person to person, so rather than chasing a fixed number of hours, give yourself enough opportunity to sleep. Make your bedroom sleep-friendly. Keep it cool, dark, and quiet, and set aside some quiet time to wind down before bed. Limit anything that could disrupt your sleep. If caffeine affects your sleep, skip it in the late afternoon and evening, and count any caffeinated gels or drinks you used during your run. Avoid using alcohol as a sleep aid. How to Know When You’re Ready to Run Again Deciding when to run again after a long run means weighing how you feel, how much recovery time you have before your next workout, and what that session will demand. Your training plan should respond to how your body handles training load, not just what’s on the calendar. Use three steps to guide the decision: understand how long recovery may take, check how you feel, and adjust your next run to match. How Long Does Recovery After a Long Run Take? Recovery time varies from runner to runner. How long you need depends mostly on how demanding the long run was compared with your usual training, including its distance and intensity and how much fatigue you’ve built up recently. Sleep, life stress, and your overall health also play a part. Start by asking whether the run was significantly longer or harder than usual. A familiar long run at an easy effort may need less recovery time, while one well beyond your usual training load may need more. Ready for an easy run and ready for a hard workout are two different things. You may be able to run easy before you’re ready for intervals, a tempo run, or another long run. What to Check Before Your Next Run Look at how your condition is trending rather than searching for a single “ready to run” number. Check three areas: Muscles and daily movement: Is leg discomfort easing or getting worse? Does walking or taking the stairs cause pain or limit your movement? Fatigue and energy: Do you still feel noticeably tired? Do everyday tasks take more effort than usual? Sleep and overall well-being: Have you been sleeping noticeably less? Do you still feel unwell or persistently below your usual level? Consider an easy run if you’re improving, and keep resting if symptoms persist or worsen. If discomfort is easing and your energy is returning to normal, an easy run may be an option. If symptoms hang on or get worse, keep resting or adjust your plan further. Subjective recovery measures can help guide this decision. Use watch data to support your judgment, not replace it. If you train with a Suunto watch, review your recovery-related data, sleep records, and recent training load on your watch and in the Suunto app to see how your recovery is progressing. With HRV, focus on recent trends against your personal normal range rather than a single reading. Weigh this data alongside your fatigue, how your legs feel, and how easily you handle daily activities, and base the decision on more than one day’s readings. Stop running and get a professional assessment if warning signs appear. Pain that keeps getting worse, noticeable swelling, or discomfort that interferes with normal activities all warrant an assessment. Seek immediate medical care if you notice tea- or cola-colored urine, unusually severe muscle pain, or marked weakness. How to Adjust Your Next Run Based on Recovery Choose whether to delay, scale back, or run as planned based on how you feel. Your options go beyond running as planned or skipping the run altogether. Delay your run if you still feel noticeably tired or your discomfort isn’t improving. If you have any of the warning signs above, get a professional assessment first, rather than using a test run to find out whether it’s safe to run. Scale back if you’re improving but unsure you can handle the planned workout. Shorten the distance, lower the intensity, or swap intervals or a tempo run for an easy run. Keep checking in with your body once you start. If discomfort worsens or an easy pace feels unusually hard, reduce the load further or end the run. Return to your training plan when you feel close to normal, daily activities feel normal, and you have no noticeable buildup of fatigue. The more demanding the planned workout, the more carefully you should weigh your current condition, recent training, and the specific demands of that session. Conclusion Recovery after a long run is about reading your body rather than following a fixed routine or waiting out a countdown. It starts with understanding how demanding the run was, covering the basics of hydration, nutrition, activity, and sleep, and adjusting your plan to how you feel and what your next workout requires. Watch data helps you track recovery, and it works best alongside your own sense of how you feel and your judgment about training. Rather than rushing back into your original plan, adjust your next run to match your recovery, whether that means delaying it, scaling it back, or returning to training as planned. Giving yourself room to recover is what keeps you training consistently over the long term. FAQ What’s the best way to recover after a long run? Focus on the basics: rehydrate, eat foods that provide carbohydrates and protein, get enough sleep, and balance rest with easy movement based on how you feel. Then plan your next run around your current recovery level. Is it okay to run if my legs are still sore? Mild muscle soreness doesn’t necessarily mean you need to skip your run. Stop running, though, if soreness keeps getting worse, interferes with daily activities, or changes your running form. If you still feel fatigued, rest or lower the intensity of your next workout. When should I see a doctor after a long run? Stop running and get a medical evaluation if pain keeps getting worse, you notice significant swelling, or discomfort interferes with daily activities. Seek immediate medical care if you have tea- or cola-colored urine, unusually severe muscle pain, or marked weakness, as these may be warning signs of rhabdomyolysis. Do I need extra recovery methods after a long run? Usually not. Stretching, foam rolling, massage, and cold-water immersion are optional extras. If they help you feel better, use them in moderation, but prioritize the basics: sleep, nutrition, hydration, and adjusting your next run to your recovery.

Interval training for running alternates harder efforts with recovery periods to build speed and endurance. Done well, every session is controlled and repeatable, with the format, intensity, and recovery matched to your goals and fitness level. This guide covers how running intervals work, the most common types, how to set intensity, recovery, and frequency, and practical workouts you can follow and adapt to your own plan. Table of Contents What Is Interval Training and What Are Its Benefits? What Are the Examples of Interval Running? How to Do Interval Training Interval Running Workouts by Goal How to Track Your Interval Training Progress Takeaways FAQ What Is Interval Training and What Are Its Benefits? Interval training alternates higher-intensity exercise with low-intensity activity or rest. A typical session is built from work intervals, recovery intervals, and a set number of repetitions. The method works across running, cycling, swimming, and other sports, but this guide focuses on running. Alternating faster running with jogging, walking, or rest gives interval running several potential benefits, depending on how you structure the workout: Better cardiorespiratory endurance: Improves your body’s ability to deliver and use oxygen during exercise, making interval running a useful part of an endurance training plan. Stronger speed endurance: Builds your ability to resist fatigue at faster speeds and hold your pace through the later stages of a run. More explosive power: Short sprint intervals can improve neuromuscular performance, helping you accelerate and sprint more effectively. What Is High-Intensity Interval Training? High-intensity interval training (HIIT) is a form of interval training where work intervals are run at high or near-maximal effort, separated by recovery periods. All HIIT is interval training, but not all interval training is HIIT. Many running interval sessions use controlled speeds or threshold intensity, well below maximal effort. What Are the Examples of Interval Running? You can structure running intervals in several ways, depending on work interval length and training focus. These formats overlap rather than sitting in separate categories. Whichever you choose, the overall training load still comes down to work intensity, recovery, and the number of repetitions. Time-Based and Distance-Based Intervals Time-Based Intervals: For example, run at a faster pace for 2 minutes, then jog easily for 2 minutes to recover. Each interval can cover a different distance, which makes this format easy to use on any route or terrain and simple to control by time. Distance-Based Intervals: For example, run 400 meters or 1 kilometer, then recover. This format makes it easier to monitor pace consistency across repetitions and works well on a track or when you’re training for a specific race distance. New to interval training, or often running on varied routes and terrain? Time-based intervals are usually easier to follow. If you want to practice a specific pace, compare repetitions, or prepare for a 5K or 10K, distance-based intervals are often more useful. Short, Long, Pyramid, and Fartlek Intervals Beyond time and distance, you can also group running intervals by work interval length, workout structure, or how your speed changes through the session. Short and Long Intervals: These differ in how long each work interval lasts. Short intervals use brief efforts and are often used to sharpen speed and pace control. Long intervals use sustained efforts that help you accumulate more time at higher intensity. Pyramid Intervals: Work intervals build in length, then step back down. For example, run faster for 1, 2, 3, 4, 3, 2, and 1 minute, with recovery between each. Fartlek Runs: Mix faster and slower running within one continuous run. Speed changes can follow perceived effort, terrain, or a planned structure, which makes fartlek one of the most flexible formats. How to Do Interval Training When planning an interval workout, start with four key variables, then adjust based on how you perform: Work Interval: The duration or distance of each faster segment, such as 1 minute, 3 minutes, 200 meters, or 1 kilometer. Intensity: Your target pace, heart rate, or power for each work interval. Recovery Interval: The recovery time or distance between repetitions. Repetitions and Total Workload: How many work intervals you’ll complete, and the total duration or distance of the session. You can build a structured workout in the Suunto app and sync it to a compatible watch, so you always know whether you’re in a work or recovery interval mid-run. How to Set Interval Intensity Match your interval intensity to your training goal. Start by judging how hard you’re working, then use your workout data to fine-tune the effort. Perceived effort: Rate how hard you’re working on a 0 to 10 rating of perceived exertion (RPE) scale. For high-intensity intervals, an RPE of 7 to 9 is a useful guide. Set the effort to your training goal rather than sprinting all-out on every repetition. Device data: Use target pace and heart rate to monitor intensity. If you have reliable maximum heart rate or lactate threshold data, you can use it to set your personal heart rate zones. For shorter intervals, lean on pace and RPE, since heart rate can lag behind changes in effort. Wear a Suunto sports watch to track real-time pace and heart rate during the session. Afterward, compare your data across repetitions to see whether your pace held steady and your heart rate responded as expected. For deeper insight into real-time exercise intensity, explore Suunto ZoneSense, which uses heart rate variability (HRV) data on compatible Suunto watches to show how your body responds to different training intensities. How to Plan Recovery Between Intervals The right recovery depends on your training goal and how much rest you need to hit your target intensity on the next interval. Choose your recovery method: Jogging keeps you moving at low intensity, while walking or standing still reduces the workload further. Pick the option that best supports your recovery needs. Set your recovery duration: Start with a fixed recovery time, then check whether you can hold your target pace and good form on the next interval. If your pace drops significantly or your effort and form start to slip, extend the recovery. If your goal is to build more time at target intensity, keep breaks only as long as you need. Your heart rate can stay elevated between intervals; it doesn’t need to return to resting before you go again. How Often Should You Do Interval Training? If you’re new to interval running, start with one session per week. Once your body adapts, you can build to two. Schedule recovery runs or rest days between interval sessions to keep high-intensity workouts from landing back to back. If you’re still noticeably fatigued or sore on a planned interval day, move the session. If a second weekly session makes it hard to complete your planned workouts or keeps affecting your easy runs, drop back to one. Interval Running Workouts by Goal Once you understand how interval training works and how to structure a session, choose a workout based on your current running fitness and goals. Treat the examples below as starting points, and adjust pace, recovery time, and total workload to your ability. Start every session with an easy run and a dynamic warm-up, and finish with an easy run or walk to cool down. For Beginners: Run-Walk Intervals If you’re new to running or not yet comfortable running continuously, run-walk intervals are a simple way to build running endurance. Keep the effort manageable and extend your running time as your body adapts. Warm-up: 5 minutes of easy walking Work interval: 1 minute of easy running Recovery interval: 2 minutes of walking Repetitions: 8 Cool-down: 5 minutes of easy walking Keep the running segments easy and controlled, at an effort where you can still talk in short sentences. Focus on consistency over speed. As you adapt, gradually lengthen the running intervals or shorten the walking breaks. For Intermediate Runners: Short and Long Intervals If you already run regularly, choose short or long intervals based on the goal of the session. Short intervals build coordination and pace control at faster speeds, while long intervals help you accumulate more time at higher intensity. Warm-up: 10 to 15 minutes of easy running, followed by dynamic warm-up exercises Short interval example: Run 200 meters at a faster pace, then recover with 200 meters of easy jogging or walking. Repeat 6 to 8 times. Long interval example: Run at a higher intensity for 3 minutes, then recover with 2 minutes of easy jogging. Repeat 4 times. Cool-down: 5 to 10 minutes of easy running or walking Match the intensity to the length of each work interval, and adjust as you go so you can finish the full workout at the right effort. For Race Preparation: Race-Pace Intervals If you have a solid training base and a 5K or 10K on the calendar, race-pace intervals help you lock in your target pace and practice holding it across repeated efforts. Warm-up: 10 to 15 minutes of easy running Work interval: Run 1 kilometer at your target race pace Recovery interval: 2 to 3 minutes of easy jogging Repetitions: 3 to 5 Cool-down: 5 to 10 minutes of easy running or walking Trying this workout for the first time? Start with 3 repetitions and add more as your performance and recovery allow. The goal is a steady target pace on every repetition, rather than a faster one each time. If you’re preparing for a half marathon or marathon, adjust the length of each work interval and the total workload to suit your race distance and training phase. How to Track Your Interval Training Progress The clearest way to measure progress is to compare workouts completed under similar conditions. Watch for these changes: Pace at the same target intensity: In similar workouts, can you hold your target pace more consistently and avoid major slowdowns in the later repetitions? Heart rate at a similar pace: Under comparable conditions, such as route, weather, and workout intensity, does your heart rate show a consistent trend over time? A single fluctuation isn’t enough to signal improved fitness. Perceived effort during the workout: Does the same workload gradually feel more manageable? Can you recover enough within each planned recovery interval to be ready for the next repetition? Post-workout recovery: Can you keep up your usual performance on the easy runs that follow, without lingering fatigue? Use the Suunto app to review your training history and compare pace, heart rate, and perceived effort across similar workouts. Your Chronic Training Load (CTL) trend also shows your accumulated training load over recent weeks, so you can judge whether it suits your recovery. For a more personalized training plan, use Suunto AI Coach in the Suunto app with Suunto Race 3S. Based on your training goals, recent performance, and recovery data, it can help you decide whether to adjust today’s interval workout and how to plan the sessions that follow. Takeaways Interval training balances work intensity, recovery, and total workload to make speed work controlled and repeatable. Whether you’re building a running habit with run-walk intervals or dialing in your target race pace, prioritize good form and consistent pacing across every repetition over a single all-out effort. Treat interval training as part of a long-term plan. Start at an intensity and workload that suit your current fitness, adjust frequency based on recovery, and track progress by comparing similar workouts over time. Build the workload when you can complete sessions consistently, and ease back when fatigue builds or performance dips. That’s how you get faster through sustainable training. FAQ What Is Interval Strength Training? Interval strength training alternates strength exercises with rest or low-intensity activity. For example, you might complete a set of squats, take a short break, then move on to the next set. Can Interval Running Improve Endurance? Yes. Interval running can improve your aerobic fitness and your ability to sustain a run. Combine it with easy runs and long runs as part of a balanced endurance training plan. Is 20 Minutes of Interval Training Enough? Yes. A 20-minute interval workout can still deliver real training benefits. Just keep in mind the difference between total workout time and the actual time spent at high intensity, and match the workload to your fitness level. Why Is My Heart Rate Still High During Interval Recovery? After a hard effort, your heart rate takes time to come down. Exercise intensity, recovery length, temperature, and accumulated fatigue all affect how quickly it recovers. That’s normal, and your heart rate doesn’t need to return to its resting level between intervals.

Two runners share the same VO₂max, yet one runs faster. You've trained consistently for months, yet your usual pace still feels hard. Running economy is key to understanding these differences. It affects how much oxygen and energy runners need at the same speed and how efficiently you can maintain your target pace. This guide explains what running economy is, how it's measured, and how to improve it, so you can choose the right training for your goals and fit it into the plan you already have. At a Glance Running economy is the oxygen or energy it takes to run at a given speed. The lower the cost, the better your economy. VO₂max and running economy measure different parts of your fitness, and both shape your running performance. Lab gas analysis measures running economy directly. Sports watch data adds useful supporting context. Regular running, strength training, plyometrics, and faster running drills can all improve running economy. Build gradually, recover well, and track heart rate, pace, and perceived effort to follow your progress. Table of Contents What Is Running Economy? How to Measure Running Economy? How to Improve Running Economy? How to Add Running Economy Training to Your Plan Takeaways FAQs What Is Running Economy? Running economy (RE) is the energy it takes to hold a given submaximal speed. Submaximal means below all-out effort, at a pace where your body can settle into a relatively steady state. Researchers usually assess RE by measuring oxygen consumption or energy cost at a constant speed. Under the same conditions, the less energy a runner needs to hold that speed, the better their RE. Running Economy vs. VO₂max vs. Lactate Threshold To better understand the role of RE in endurance performance, it helps to compare it with other measures of a runner’s physiological capacity. Here, lactate threshold refers primarily to the second lactate threshold (LT2). Comparing RE with VO₂max and lactate threshold offers different perspectives on how these metrics relate to running performance: VO₂max represents the upper limit of the body’s ability to take in and use oxygen. LT2 helps indicate how much intensity a runner can sustain for an extended period. RE reflects the oxygen or energy cost of maintaining a given speed. For example, two runners with similar VO₂max values may perform differently because of differences in RE. At the same pace, the runner with better RE uses less oxygen and can maintain the target pace at a lower physiological cost. The other runner needs more energy and may fatigue sooner over longer distances or in the later stages of a race. LT2 also affects performance: a higher speed at LT2 generally means a runner can sustain a faster pace for longer. What Factors Affect Running Economy? RE depends on factors you're born with and factors you can train. Genetics, body structure, and muscle fiber makeup are hard to change, while muscle strength and neuromuscular coordination respond well to targeted training. Running form is another factor runners often focus on, but there is no single most economical running form for everyone. Metrics such as cadence, foot strike, vertical oscillation, and ground contact time need to be considered in the context of running speed and individual movement patterns. A higher cadence, lower vertical oscillation, or shorter ground contact time does not automatically mean better RE. Unless there is a clear issue with your form, you don’t need to change it just to hit a target metric or imitate a particular running style. If adjustments are needed, make them gradually and assess the results based on comfort and overall training performance, rather than appearance or a single metric alone. How to Measure Running Economy? The most common direct method is laboratory gas analysis. You run on a treadmill at a set submaximal speed while a mask and gas analyzer measure your oxygen consumption. Researchers watch for oxygen consumption per minute to level off, because once you reach a steady state, the reading reflects what that speed actually costs you. Testing at one speed or several shows how your economy changes across different paces. Results are commonly reported as oxygen consumption per kilogram of body weight per minute (mL/kg/min), oxygen cost per kilometer (mL/kg/km), or energy cost (kcal/kg/km or J/kg/m). For a fair comparison, keep the speed, units, equipment, and testing protocol consistent. Sports devices can also provide supporting estimates. For example, the SuuntoPlus Running Economy sport app analyzes the relationship between heart rate and normalized graded pace (NGP) to assess running performance. This data gives helpful context, while direct oxygen consumption testing remains the reference measurement. How to Improve Running Economy? Improving RE starts with consistent aerobic training and can be supported by strength training, plyometrics, and faster running drills. Each provides a different training stimulus. Build Consistency and Progress Gradually Consistent running helps build an aerobic base and gradually increase mileage, creating a foundation for better RE. However, more mileage isn’t always better. It’s equally important to train consistently while managing your training load. Adjust your training gradually based on your current ability and how your body adapts. If you already train consistently, you can gradually increase your mileage or adjust your workouts as recovery allows. If you’re training for a race, add some goal-pace running to become familiar with the rhythm required on race day. Adjust the frequency and intensity based on your training response. Develop Muscular Strength and Power Strength training and plyometrics can both help improve RE, but they work in different ways. Strength training helps your muscles produce more force to support your stride and maintain running form. Plyometrics develop explosive power, or the ability to produce and use force quickly, such as transitioning from landing into the next push-off. In simple terms, strength training focuses on how much force you can produce, while plyometrics focus on how quickly you can produce and use it. Strength training: Build your routine around exercises such as squats, Bulgarian split squats, deadlifts, Romanian deadlifts, and calf raises. If you’re new to strength training, learn proper techniques before gradually increasing resistance. Plyometrics: Common running-specific exercises include continuous two-legged hops, single-leg hops, and bounding. Focus on transitioning smoothly from landing to takeoff rather than simply jumping higher or doing more repetitions. Start with a small number of simple two-legged jumps, then increase the volume or difficulty as your technique improves. Practice Faster Running With a Clear Purpose Strides, short hill sprints, and short-distance repeats add speed, power, and neuromuscular coordination work to your easy runs. Practicing faster running can help you develop smoother movement and avoid unnecessary tension. This may allow you to generate the force needed to maintain a pace with less energy or oxygen, potentially improving RE. Strides: Gradually accelerate, stay relaxed and smooth, then slow down under control. Focus on coordination at faster speeds rather than sprinting all-out. Short hill sprints: Use an uphill slope to increase the force required with each stride. These brief efforts differ from longer hill intervals; the slope, duration, and effort level all affect the training load. Short-distance repeats: Run a set distance at a planned pace, then recover before repeating it, such as with 200 m repeats. You can set up work and recovery intervals in the Suunto app to follow a planned session. Focus on maintaining a consistent pace and good form across repetitions rather than speeding up each time or running to exhaustion. How to Add Running Economy Training to Your Plan When adding RE training to your plan, start by defining its purpose: building a consistent routine, preparing for a race, or adding additional exercises to your existing running schedule. Once your goal is clear, decide when to schedule the workout and whether it should be integrated into, replace, or supplement an existing run. Allow enough time to assess the results. Start With Your Main Training Goal If you're building a running habit, focus on completing your weekly runs consistently before adding supplementary work. If you're preparing for a race, protect your key race-specific workouts, then decide where supplementary work fits or what it can replace. If your routine is already stable, focus on one area at a time, such as strength or power. Adjust as You Go After adding new exercises, check how well they fit your schedule and whether they affect the quality of your next runs. If they make key workouts hard to complete as planned, or fatigue and soreness keep carrying into your running, reduce the volume, lower the difficulty, or move them to a different day. As your body adapts, build the load back up gradually. You don't need every exercise. Prioritize training you can sustain, that supports your current goal, and that leaves your key running sessions intact. Let your training performance in the weeks that follow guide any further changes. Make Room in Your Existing Plan Once you’ve chosen your focus, work it into your actual schedule rather than simply adding another workout at the end of your plan. Most supplementary exercises should build on a foundation of regular easy runs and consistent training. Add targeted speed, strength, or plyometric work when you’re completing your usual training reliably and recovering well. Strides: Incorporate them into an existing easy run rather than scheduling a separate workout. Short hill sprints or short-distance repeats: Replace part of a planned run or make them the main focus of a running session, depending on that day’s training goal. Strength or plyometric training: Allow enough time for recovery so that the added fatigue doesn’t repeatedly affect your other runs. You can also use the Training Zone in the Suunto app to review your weekly training load, intensity distribution, and activity records. This can help you assess how supplementary exercises fit into your overall plan. Track Your Progress Over Time Improving RE takes consistent training. A systematic review found that strength training programs lasted 6–24 weeks. This range can help you plan a training block, but it doesn’t guarantee when you’ll see results. Outcomes also depend on your training background, the methods used, and the speed at which RE is tested. You can also track heart rate, pace, and perceived effort to help monitor changes in running performance. For example, running faster at a similar heart rate, or finding a familiar pace easier to maintain, under similar route, weather, and intensity conditions may indicate improved performance. However, when interpreting changes in running heart rate, account for factors such as fatigue, temperature, terrain, and your day-to-day condition. These metrics alone cannot confirm that your RE has improved. Recording and comparing data under similar conditions over time gives you a better picture of longer-term trends. Takeaways RE helps explain how much energy it takes to maintain a given pace and how aerobic capacity translates into running performance. Regular running, strength training, plyometrics, and faster running drills such as strides and short hill sprints provide different training stimuli that may improve RE. No single method works for every runner, and improvements take time. Choose exercises that fit your current goals, incorporate them into your existing plan, and track heart rate, pace, and perceived effort under similar conditions to assess changes in performance over time. FAQs What Is a Good Running Economy Value? There's no single benchmark for every runner. When measured as oxygen consumption (mL/kg/min) or oxygen cost per kilometer (mL/kg/km), lower values generally mean better economy. Other metrics need to be read according to how they're defined. In every case, the less oxygen or energy you need to hold a given speed under the same testing conditions, the better your RE. Rather than comparing yourself with other runners, track changes in your own results under consistent conditions. Can Running Economy Improve Without Increasing VO₂max? Yes. VO₂max is the upper limit of your aerobic capacity, while RE is the energy cost of running at a given speed. The two can improve independently, so you can learn to hold the same pace on less oxygen even if your VO₂max stays the same. How Does Better Running Economy Affect Race Times? Better RE means you need less oxygen or energy to hold the same pace, so your target pace costs you less physiologically. That gives you a stronger foundation for race day, while your actual result also depends on endurance, pacing, fueling, and race conditions. Can Running Shoes Improve Running Economy? Some running shoes can improve RE by reducing the energy needed to hold a given pace, though the effect varies by runner, speed, and shoe model. Think of shoes as an immediate equipment boost, and consistent training as the source of lasting adaptation.

Yesterday's session was a hard one. Today your legs are sore and your energy is gone. Do you stay on the couch, or get out for a walk or an easy spin to get your body moving? That's the question active recovery answers. Below, we cover what it is, when it helps, and how to do it, so you can make smarter recovery calls based on how your body actually feels. Table of Contents What Is Active Recovery? Active Recovery vs. Passive Recovery Benefits of Active Recovery Active Recovery or Rest: How to Choose How to Choose the Right Active Recovery Activities for You How to Do Active Recovery Conclusion FAQ What Is Active Recovery? Active recovery is low-intensity movement that helps your body bounce back from training while adding very little training load. Here's the key point: the activity alone doesn't decide whether it counts as active recovery. Intensity, purpose, and how your body responds matter just as much. An easy walk after a hard session, at a comfortable pace and leaving you no more tired than when you started, is textbook active recovery. Attach a pace, step count, or calorie target to that same walk, and it becomes training. Active Recovery vs. Passive Recovery So how does active recovery differ from simply resting? Each has its place. Here's how the two compare on goal, typical activities, and training load: Comparison Dimension Active Recovery Passive Recovery Primary Goal Helps the body relax and adapt through gentle physical activity without adding significant training load. Allows the body and nervous system to fully rest and recover. Typical Forms Light walking, low-intensity cycling, gentle swimming, or stretching and mobility exercises. Complete rest, lying down, sleeping, or using passive recovery methods such as cold or heat therapy. Training Load Minimal (low intensity, low stress). No additional training load. Benefits of Active Recovery From an exercise-science standpoint, active recovery pays off in a few clear ways: Clears Blood Lactate Faster After Hard Efforts Just finished a hard interval session or a long trail run? Keep walking or spinning easily for another 10 to 20 minutes before you sit down. Low-intensity movement clears lactate from your blood noticeably faster than complete rest. It's the best-supported benefit of active recovery, and the reason so many athletes cool down after a race. Keep it in perspective, though. Faster lactate clearance is not the same as faster muscle repair. Lactate clears on its own within an hour or two anyway, and it isn't what makes you sore the next day, so treat it as one recovery marker among several. Reduces Muscle Soreness and Stiffness Most of us know that all-over sore, stiff feeling the day after a hard session, known as delayed-onset muscle soreness (DOMS). Light movement usually feels better than a day on the couch. Gentle exercise increases local blood flow, warms the tissue, and takes stiff muscles and joints through their range of motion, so soreness and stiffness ease and you settle back into your training rhythm sooner. Bear in mind that it eases how soreness feels rather than speeding up the repair of the muscle fibers themselves. Mental Benefits For many runners, a full day off feels worse than an easy one. The body stiffens, the next workout is harder to start, and the nagging "am I falling behind?" feeling creeps in. Low-intensity movement keeps your muscles and joints moving through their range, so your body stays ready for the next session. Doing something for your recovery is also a small win in itself. It keeps your routine intact and makes a recovery day a productive part of training. Active Recovery or Rest: How to Choose When you wake up tired or sore the day after training, the decision comes down to one question: move a little today, or rest completely? Plenty of athletes fall into the streak trap: if a recovery session is on the schedule, they grind through it however beaten up they feel. Active recovery is one option, and the rest your body actually needs always comes first. Feeling okay? Move lightly. Deeply fatigued, or noticing the first sign of an injury? Rest fully. That's the better call for your body. Weigh how you feel against what your data says, then use the table below to decide which recovery style fits today: Assessment Dimension Recommended: Active Recovery Recommended: Complete Rest Main Muscle Soreness and Fatigue Only mild or moderate muscle soreness, with a good mental state and some motivation for light activity. Severe full-body fatigue, mental exhaustion, very poor sleep quality, or feeling psychologically overwhelmed by activity. Discomfort and Pain Muscle tightness or mild soreness, with a gradual improvement in comfort after starting activity. Sharp or localized pain (e.g., in joints, ligaments, or bones), or pain that worsens with activity. Recent Training Load Within a normal training cycle, with the previous session's intensity and duration appropriate for the individual's fitness level. Just completed a high-intensity competition, an extremely demanding consecutive training block, or several consecutive days without adequate recovery. Data Reference (Some Suunto Watches) Fatigue (ATL) is slightly to moderately elevated; Recovery Status indicates good or fair recovery, with an overall willingness to train and no unusual discomfort, suggesting suitability for low-intensity activity. Fatigue (ATL) is at a very high level; Recovery Status indicates poor recovery or an unbalanced state. If accompanied by significant fatigue or reluctance to exercise, this suggests the body may still be under substantial stress. Even after deciding you're fit for active recovery, you're free to cut the planned session short. A lot of fatigue and discomfort only shows up once you start moving. Use this simple rule of thumb: Feeling good: the movement feels easy, your breathing stays smooth, and soreness is easing. Finish the light session as planned. Stop when needed: fatigue builds, stiffness gets worse, or something feels off. Stop and switch to full rest. Know when to get help: if pain or persistent fatigue lingers, see a sports medicine professional or a doctor. How to Choose the Right Active Recovery Activities for You Once you've decided to move, the next step is choosing what to do. The rule is simple: the right activity is the one that's easiest to keep at a low intensity and fits the space and equipment you already have. Stick with the gear you own, and keep to one activity at a time. Use the table below to choose based on how familiar you are with each activity and which parts of your body feel tired today: Active Recovery Activity Category Typical Activities Applicable Conditions & Selection Recommendations Low-Impact Aerobic Light walking, leisure cycling, easy swimming Most recommended and easiest to control. Suitable for those with mild lower-limb muscle soreness, who want to breathe fresh air, or who have access to existing venues/equipment (e.g., parks, stationary bikes at the gym). Mobility & Stretching Gentle yoga, dynamic stretching, foam rolling Best choice with no equipment at home. Suitable for full-body tightness, restricted joint mobility, or when going out is inconvenient. Focus on relaxation and stretching, not on challenging high-difficulty balance or strength movements. Light Resistance & Bodyweight Activities Banded stretches with light resistance bands, extremely light/bodyweight exercises (e.g., bodyweight deep squats/squats, arm circles) Suitable for those accustomed to strength training or needing recovery of specific body parts. Ideal for using light equipment like resistance bands at home or in the gym for low-load activation. Focus on promoting local blood circulation through small-range, low-resistance movements; avoid pursuing fatigue or adding weight. Can I Run for Active Recovery? Recovery runs are hugely popular in running circles—a short, easy jog. So does one count as active recovery? The answer depends on who's asking: For experienced runners: if you have a solid mileage base and can hold the pace down with real discipline—staying in heart rate zone 1 the whole time, able to chat easily—a very short, easy jog can be an option. For most recreational athletes and beginner runners: running carries continuous impact, and even a slow pace loads your lower-limb joints and tired muscles. If your last session was a run, or your legs are clearly sore, go for walking, easy cycling, or swimming instead—or simply rest. How to Do Active Recovery Once you've picked an activity, the details—intensity, duration, and frequency—decide whether this is real recovery or just another workout in disguise. Keep the Intensity Low The golden rule of active recovery: when in doubt, go easier. Here's how to judge your intensity: How you feel: Talk test: you should be able to hold a full, unbroken conversation with zero effort, breathing steady the whole time. If you're gasping or can't string sentences together, you're going too hard. RPE (rating of perceived exertion): on a 1–10 scale (higher = harder), active recovery should sit at 2–3—very light to easy. Heart rate as a backup check: a common guideline is 50%–60% of your max heart rate (the Zone 1). Keep in mind that resting and max heart rates vary widely from person to person, so there's no single bpm number that works for everyone. While you're moving, a Suunto watch can help you keep an eye on it: set Zone 1 as your intensity target before you start, and the watch shows your current zone in real time—if your heart rate drifts above the target zone, it'll nudge you to slow down so you stay in true recovery territory. Set the Duration Based on the Scenario How long should each active recovery session be? It depends on the situation and your own fitness background, so there's no one-size-fits-all number: Between hard sets: during heavy lifting or high-intensity intervals, 1–3 minutes of easy spinning or slow walking between sets keeps blood moving through the muscles. Post-workout cool-down: right after a hard session, take 5–10 minutes of slow walking, easy cycling, or dynamic stretching to bring your heart rate down gradually. On a rest day: 20–45 minutes of light activity is plenty. Go past 45 minutes—or worse, hours—and even very low intensity can pile up central nervous system fatigue simply because the session runs too long. Schedule Recovery Days Around Your Training Load Plan recovery days based on the nature of your training load and how tired you actually are—don't blindly copy a formula: After a regular hard training day (a standard strength day or tempo run): an active recovery day usually slots in right after the big day, bridging you to the next session. If you wake up with only mild stiffness and good energy, 1–2 days of active recovery works well—light blood flow helps wash out the stiffness. After an extreme effort or long race (a marathon or an all-out day): prioritize full rest. Your muscle fibers have structural damage, and your immune system runs suppressed for days after the race—forcing a workout now only stalls repair and raises injury risk. A 10–15 minute easy walk to keep blood circulating is all you need. Once muscle tenderness fades and your resting heart rate is back to normal, ease back in with low-impact options like walking or swimming, step by step. Conclusion Active recovery works best as a tool you choose, rather than a task you check off. Before you head out, check in with your body and decide whether today is a day to move. If it is, pick something easy to keep light, and notice whether it stays easy and smooth. When your body sends clear signals of fatigue or discomfort, choose complete rest without guilt, rather than squeezing in a recovery workout to protect a streak. Combine objective data with an honest read of how you feel, and recovery will keep powering your long-term performance. FAQ Does Yoga Count as Active Recovery? It depends on the type and intensity of the yoga. Counts: slow-paced yin or restorative yoga built around stretching and breath work relaxes tight muscles and the nervous system beautifully. Doesn't count: power yoga, hot yoga, or advanced flow classes that demand core strength, continuous explosive effort, or high energy output. Don't sign up for another demanding fitness class in the name of "recovery." Can I Do Active Recovery Every Day? We don't recommend turning "dedicated recovery sessions" into a daily must-do. Light daily movement as part of everyday life is healthy and encouraged. But if you're adding a dedicated recovery run, recovery ride, or long practice session every single day, they still eat up time and stack small amounts of load on top of each other. From a pure metabolic standpoint, rather than doing dedicated active recovery daily, it's smarter to place it right after your harder sessions—that's when light movement does the most to speed up lactate clearance. Can I Eat or Fuel Normally on an Active Recovery Day? No need to diet hard or slash carbs. You burn fewer calories on an active recovery day than on a training day, but your body still needs plenty of protein to repair damaged muscle fibers, plus enough carbohydrate to restock the glycogen drained from your muscles and liver. Eating a balanced, healthy diet is the foundation that lets your body actually repair itself.

Two compact Race watches, one character apart. Suunto Race S arrived in 2024 as the smaller, lighter way into the Race family. Suunto Race 3S is its successor: a new-generation performance watch built for smarter training and trail running, in a case sized for smaller wrists. Race 3S is the more capable watch. The real question is whether its upgrades change how you train, or whether Race S already covers everything you need. Here is what changed, what carries over, and how to pick the right compact Race for your wrist. At a Glance Suunto Race S45 mm case, 53 g in titanium, 1.32-inch AMOLED at 600 nits, and up to 30 hours of dual-band GPS. The lighter, more affordable compact Race. Suunto Race 3S46 mm titanium case with sapphire glass, 56 g with strap, 1.32-inch LTPS Hybrid AMOLED at 2,000 nits, and up to 38 hours of dual-band GPS. The new-generation compact Race, and the watch that debuts Suunto AI Coach. Biggest UpgradesA screen over three times brighter, 8 more hours of dual-band GPS, sapphire glass, the Apollo 510 processor, an upgraded heart rate sensor, double the storage, and Suunto AI Coach. Shared by BothFree worldwide offline maps, dual-band GPS, Climb Guidance, 5 ATM water resistance, a full range of sport modes, and complete training analysis in the Suunto app. Rule of ThumbChoose Race 3S for the brighter screen, longer battery, tougher glass, and AI coaching. Choose Race S to save a few grams and some money. Table of Contents The Short Answer: Which One Fits You? Suunto Race 3S vs Race S: Full Comparison Display: 2,000 Nits vs 600 Nits Battery: Up to 38 Hours of Dual-Band GPS Build: Sapphire Glass and a Titanium Case Processor: Apollo 510 vs Apollo 4 Plus Heart Rate: An Upgraded Optical Sensor AI Coach: A Coach That Knows You What Both Watches Share The Race Takeaway FAQ The Short Answer: Which One Fits You? Choose Suunto Race S if you: want the lighter, more affordable way into a compact Race watch run and train at distances that finish well inside 30 hours of GPS train mostly in everyday light, where a 600-nit screen reads clearly already own Race S and it covers everything you do Choose Suunto Race 3S if you: want a 2,000-nit screen you can read at a glance in full sun, snow glare, or high-altitude light go long: big trail days, ultras, or back-to-back sessions between charges want Suunto AI Coach building and adapting your training plan want sapphire glass, the faster Apollo 510 processor, and an upgraded heart rate sensor want 64 GB of storage for maps, routes, and training data Still weighing it up? The sections below take each difference in turn. And the features you rely on most, free offline maps and dual-band GPS, come with both watches. Suunto Race 3S vs Race S: Full Comparison Both watches share their software, their maps, and their core running tools. The gap opens up in six places: display, battery, build, processor, heart rate, and AI Coach. Specification Suunto Race 3S Suunto Race S Case size 46 x 46 x 11.4 mm 45 x 45 x 11.4 mm Weight 56 g with strap 53 g titanium (60 g stainless steel) Case material Titanium Titanium or stainless steel Front glass Sapphire Corning Gorilla Glass Water resistance 5 ATM 5 ATM Display 1.32" LTPS Hybrid AMOLED 1.32" AMOLED Brightness 2,000 nits 600 nits Resolution 466 x 466 466 x 466 Processor Apollo 510 Apollo 4 Plus Heart rate sensor 6 LEDs + 4 photodiodes 4 LEDs + 2 photodiodes GPS Dual-band (L1 + L5) Dual-band (L1 + L5) Battery, dual-band GPS Up to 38 hours Up to 30 hours Battery, daily use Up to 12 days Up to 9 days Storage 64 GB 32 GB Offline maps Free, worldwide Free, worldwide Colours Orchid, Feather, Black All Black, Gravel Gray, Power Blue, Power Orange, Powder Gray, Powder Pink, Titanium Graphite, Titanium Canary, Titanium Courtney, UTMB World Series Display: 2,000 Nits vs 600 Nits This is the upgrade you notice first, and the one that matters most when the light turns harsh. Both watches use a crisp 1.32-inch AMOLED panel at 466 x 466, so text and maps look sharp on either wrist. The difference is brightness. Race 3S delivers 2,000 nits, more than three times the 600 nits of Race S. On an exposed ridge at midday, across a snowfield, or under a hard noon sun, that is the gap between squinting at your pace and reading it mid-stride. Race S stays clear in everyday conditions. Race 3S stays readable in the harshest light you train in. Battery: Up to 38 Hours of Dual-Band GPS For long-distance athletes, this can settle it. In its most accurate dual-band GPS mode, Race 3S runs for up to 38 hours, against up to 30 hours on Race S. That is 8 more hours of full-accuracy tracking, right where you need them: deep into a long mountain day. In daily use, Race 3S lasts up to 12 days between charges, against up to 9 on Race S. Both watches offer further battery modes for longer, lower-power tracking. The short version: if your longest efforts finish comfortably inside 30 hours, Race S has you covered. If you are training for ultras, stacking back-to-back big days, or simply want to charge less often, Race 3S gives you the headroom. Build: Sapphire Glass and a Titanium Case Both watches are built to train and race in any weather, with 5 ATM water resistance for swims, rain, and river crossings. Race 3S steps up the materials. Its titanium case is topped with sapphire glass, where Race S uses Corning Gorilla Glass. Sapphire is exceptionally scratch-resistant, so if your watch trades knocks with rock, scree, and trekking poles, the screen stays clear for longer. Race 3S weighs 56 g with strap, a few grams more than Race S in titanium at 53 g. Both are compact watches that sit comfortably on smaller wrists. Processor: Apollo 510 vs Apollo 4 Plus Race 3S runs on the new-generation Apollo 510 processor, a step up from the Apollo 4 Plus inside Race S. You feel it every time you swipe through screens, load a map, or start a workout: the watch responds faster and keeps pace while you move. It is not the spec you will talk about. It is the one you will appreciate in every session. Heart Rate: An Upgraded Optical Sensor Race 3S carries an upgraded optical heart rate sensor with six LEDs and four photodiodes, against four LEDs and two photodiodes on Race S. More sensors mean a stronger signal, and that pays off exactly when wrist heart rate is hardest to read: intervals, tempo efforts, and the closing kilometres of a long run. Both watches also pair with a heart rate belt for chest-strap precision. If wrist heart rate has let you down on hard sessions, this is a strong point in favour of Race 3S. AI Coach: A Coach That Knows You The most valuable upgrade on Race 3S is software. Race 3S debuts Suunto AI Coach, Suunto's new-generation coaching experience in the Suunto app. It builds a personalised training plan around your goals, adapts it as your fitness and recovery change, and answers your training questions in plain language. Pair Race 3S with a heart rate belt and ZoneSense reads your true intensity, so your easy days stay easy and your hard days count. Every Race 3S bought before the end of 2026 includes three months of Suunto AI Coach. What Both Watches Share Whichever you choose, you get the full Suunto Race experience. Both watches include: Free worldwide offline maps for confident navigation off-grid Dual-band GPS for accurate tracking in cities, forests, and mountains Climb Guidance and turn-by-turn navigation 5 ATM water resistance A full range of sport modes covering running, trail, cycling, swimming, and more Race tools including race pacing and finish-time estimates Around-the-clock heart rate, sleep, HRV, and recovery tracking Complete training analysis, free in the Suunto app Same maps, same metrics, same analysis. The choice comes down to hardware and the newest coaching. The Race Takeaway Race 3S and Race S share the same software, the same free offline maps, and the same compact fit. What sets Race 3S apart is everything new: a 2,000-nit screen you can read in any light, up to 38 hours of dual-band GPS, sapphire glass, the Apollo 510 processor, an upgraded heart rate sensor, and Suunto AI Coach. If those upgrades match how you train, Race 3S is the clear pick. If not, Race S still delivers the core Race experience at a lighter weight and a lower price. Either way, you are wearing a real Race watch. Explore Suunto Race 3S, the new-generation compact watch from Suunto. FAQ Is Race 3S a Replacement for Race S? Race 3S is the new-generation compact Race and the successor to Race S. It keeps a case sized for smaller wrists and adds a far brighter screen, longer dual-band battery, sapphire glass, a faster processor, an upgraded heart rate sensor, and Suunto AI Coach. Race S remains a strong choice if you want the lighter, more affordable compact Race. What Is the Biggest Difference Between Race 3S and Race S? Screen and battery. Race 3S delivers 2,000 nits, over three times brighter than the 600 nits on Race S, and runs up to 38 hours of dual-band GPS against 30. On the software side, Race 3S debuts Suunto AI Coach. How Does Race 3S Compare With Race S on Weight? Race 3S weighs 56 g with strap, a few grams more than Race S in titanium at 53 g. Those grams bring a brighter screen, longer battery life, and sapphire glass, and both watches stay compact and comfortable on smaller wrists. Are Race 3S and Race S Water Resistant? Yes. Both are water resistant to 5 ATM, ready for swims, rain, and river crossings. Does Race 3S Have Offline Maps Like Race S? Yes. Both include free worldwide offline maps and dual-band GPS for confident navigation far from phone signal. Race 3S doubles the storage to 64 GB, leaving more room for maps, routes, and training data. Which Should I Buy, Race 3S or Race S? Choose Race 3S if you train long or in harsh light and want the brightest screen, the longest dual-band battery, and Suunto AI Coach. Choose Race S if you want the lighter, more affordable compact Race and it already covers your training.

One Start Line. Different Pursuits. On the morning of Sunday, October 11, more than 55,000 runners lined up in Grant Park for the 48th Chicago Marathon. Suunto athletes were there, each with different reasons and goals. Clayton Young came for a record. Charles Hicks came to find out how far his speed could carry him on a course that counts. Emma Grace Hurley came to run 26.2 miles for the first time. CJ Albertson came back to the course that gave him the best day of his career. Different pursuits, one start line. Here is how each of them got there, and what Chicago gave them in return. The Pursuit Clayton Young: The Record Chase One number defined Clayton's year: 2:04:43, the American marathon record set in Chicago in 2025 by his longtime training partner, Conner Mantz. Clayton arrived with momentum. His 2:05:41 in Boston this spring was the fastest he had ever run, but Boston's point-to-point course doesn't count for records. Chicago does. So he announced his intentions early and built his entire autumn around one goal. Charles Hicks: The Young Challenger Charles came in as the fastest American in the field on paper, carrying a 2:04:35 from Boston that, like Clayton's, came on a course that isn't record-eligible. Chicago offered him something different: flat, fast streets and the chance to show what his speed could do over the full distance on a stage that counts. Emma Grace Hurley: The Debut Emma had never raced a marathon. She had already made Chicago her city this year, though, setting the American 8K record on its streets in the spring. Three weeks before race day, she finished fifth at the World Half Marathon Championships as the top American. The question heading into October was simple: how would all that speed translate over 26.2 miles? CJ Albertson: The Return In 2024, CJ ran 2:08:17 in Chicago to finish seventh and lead the American men home. Two years later, he returned to the course that gave him his best day, ready to write the next chapter on familiar streets. The Build A marathon is decided long before the start gun. For all of our athletes, the months before Chicago were about turning ambition into fitness, one long run, one key session and one recovery day at a time. For Clayton, that meant a highly specific block with a single purpose: arriving in Chicago ready to hold record pace. Charles faced a different task, adapting the strength he built on the track and in cross-country to the volume the marathon demands, so his endurance could finally match his speed. Emma's build was about layering volume, strength and consistency week after week, turning the speed she had shown at shorter distances into a body ready for the full distance. Their training looked different from the outside. Underneath, the principle was the same: trust the process, respect the distance, and build patiently toward one morning in October. Race Week By race week, the hard work is done and the job changes. Training gives way to taper, nerves and small rituals: the final shakeout, the last easy miles, race kit laid out the night before. For Clayton, the lead-up brought an unwelcome complication. A hamstring injury put the record attempt in doubt in the days before the race. He chose to line up anyway. Race Day Chicago served up a warmer morning than marathoners hope for and one of the deepest fields in the race's history. Amos Kipruto won the men's race in 2:01:09, and Hawi Feysa defended her women's title. Behind them, the Suunto athletes wrote stories of their own. Clayton Young: 2:05:23 on a Torn Hamstring Clayton finished seventh in 2:05:23 as the top American man, racing the full distance on a torn hamstring. The record stayed 40 seconds out of reach, but his time is the second fastest ever run by an American on a record-eligible course, behind only Mantz's mark. It also made 2026 the fourth straight year Clayton has finished seventh at a major marathon, a run of consistency few at this level can match. After the race, he made it clear the chase continues: he plans to take another swing at the record soon. Charles Hicks: Two Americans in the Top Eight Charles crossed the line just 12 seconds behind Clayton, eighth in 2:05:35. On a warm day against an elite field, it was a strong statement on a record-eligible course, and it meant two Suunto athletes finished as the top two American men. Emma Grace Hurley: The Fastest Debut in U.S. History Emma's first marathon was a historic one. She finished seventh in 2:20:47 as the top American woman, running the fastest marathon debut ever by a U.S. woman and taking more than a minute off the previous mark of 2:22:10, set by Fiona O'Keeffe at the 2024 Olympic Trials. It was also the fastest marathon by an American woman since the Paris Olympics. All of this from a runner who admitted that stepping up to a distance she had never covered felt a little intimidating on the start line. What Comes Next Chicago closes one chapter and opens the next. Clayton still has a record to chase. Charles has shown what his speed can do over the full distance. Emma has put herself firmly in the conversation ahead of the U.S. Olympic Trials for the Los Angeles Games in March 2028. Suunto has been building tools for people who go further since 1936, and stories like these are the reason why. We'll be following every one of them as their next chapters unfold.