Suunto ZoneSense

The world’s first real intensity measurement

Know your real exercise intensity

In endurance training, finding the right workout intensity is key to getting the best results. Many athletes wonder if they’re training too hard or not enough. Heart rate zones have been used to estimate intensity, but they don’t account for changes from one day to another, between different activity types or during long workouts.

Now, Suunto ZoneSense offers a breakthrough in tracking real-time intensity. It uses heart rate variability (HRV) to give accurate insights, helping athletes optimize their performance like never before.

Training for building endurance, in running

In order to train for a marathon, or any challenging running distance, you should train with a mix of different styles of running. With Suunto ZoneSense, you can train in a way that you develop endurance, speed and recovery capacity, ensuring you’re ready for all aspects of a race or challenge on D Day! These are some examples.​

Easy aerobic runs​

For easy aerobic runs, you focus on building endurance in the green aerobic zone. These runs should feel light and relaxed, and ZoneSense helps you avoid accidentally running too fast by keeping you in the optimal range.​

Tempo runs​

In tempo runs, the goal is to sustain a “comfortably hard” effort in the yellow, anaerobic, zone. This pace and intensity helps improve your ability to handle faster speeds over time. ZoneSense ensures you’re pushing enough to challenge yourself without slipping into training too hard.​

Long intervals​

Finally, long intervals require alternating between maximum effort in the red, VO2 max zone, and easy recovery in the green zone. These runs improve your speed and power, and ZoneSense guides you to hit the right intensity for both the hard and recovery segments.​

Partners

Real-time intensity measurement

Suunto ZoneSense, powered by MoniCardi's cutting-edge technology, measures heart stress through heart rate variability (HRV), offering athletes real-time insight into their training intensity. Driven by the advanced DDFA index, which tracks changes in metabolic state, ZoneSense provides accurate feedback on whether your intensity is aerobic, anaerobic, or reaching VO2 max levels. This helps you to stay in the optimal training zone.

Thresholds without laboratory tests

Suunto ZoneSense helps you better understand the state of your body. Since our bodies perform differently each day, factors like one's menstrual cycle, training conditions, and recovery can affect threshold levels. While laboratory tests provide a snapshot of these thresholds for a specific day, ZoneSense offers real-time measurements every time you train, ensuring you always have the most up-to-date insight into your performance.

All endurance sports

ZoneSense works across all cardiovascular sports, from trail running and cycling to swimming and cross-country skiing. No need for personal settings like age, gender, or activity level — ZoneSense learns from your workouts, adapting to your performance in different sports for even greater accuracy.

Free feature for all Suunto users using HR belt

All Suunto users training with a heart rate belt can unlock ZoneSense intensity analysis through the Suunto app. This post-exercise insight helps you understand how your body responded to each session, empowering you to make smarter training decisions.

For real-time tracking, ZoneSense is available on the latest Suunto watches – Suunto 9 Peak Pro, Suunto Vertical, Suunto Race, and Suunto Race S. Simply download the free ZoneSense app from the SuuntoPlus Store to your watch, pair your heart rate belt to the watch, and start training!

"Use [ZoneSense] for not going too hard on your easy days or hard enough on your hard days - you should still be having fun out there, just use ZoneSense to help guide the training and help you dial in as an athlete!"


- Zach Miller, Suunto Ambassador

How to get started with Suunto ZoneSense

How to start using Suunto ZoneSense

In this video you will learn how to get started with Suunto ZoneSense.

How to use Suunto ZoneSense when training

In this video you will learn how to use Suunto ZoneSense in real-time, during an activity.

How to view Suunto ZoneSense analysis in Suunto app

In this video you will learn how to view Suunto ZoneSense data in Suunto app.

Suunto products with real time measurement

Suunto Vertical Titanium Solar Forest
Adventure watch for outdoor expeditions and training. Sapphire touchscreen and 3 bezels to choose from Outdoor offline maps to keep you stay on track Dual-band GPS/GNSS for greater accuracy Extended battery life for 60 days of daily use ABC and weather forecast feature for spatial awareness?? Advanced training metrics with 95+ sport modes Made in Finland with renewable energy
SUUNTO VERTICAL Titanium Solar Forest GPS Adventure Sports Watch SUUNTO VERTICAL Titanium Solar Forest
$1,180.91
Add to cart
Suunto Race Titanium Charcoal
Ultimate performance watch for racing and training. Opt for stainless steel or titanium variants, with sapphire touchscreen Digital crown to browse with ease Customizable sport screen for your own display Advanced training metrics with Coach AI support 40 hours of battery life in training mode Offline on-route map without getting lost Practical support for everyday situations
SUUNTO RACE Titanium Charcoal GPS Sports Watch SUUNTO Race Titanium Charcoal
$817.27
Add to cart
Suunto Race S Power Orange
Black stainless steel bezel, black case and orange silicone strap with purple gradient, SUUNTO branding and color particles.
Suunto Race S Power Orange SUUNTO RACE S Power Orange GPS Sports Watch
$544.55
Add to cart
Suunto Smart Heart Rate Belt
Accurate and comfortable multisport heart rate belt
Suunto Smart Heart Rate Belt Heart Rate Monitor Belt Suunto Smart Heart Rate Belt
$126.36
Add to cart

Learn more about the scientific background of ZoneSense

Introducing ZoneSense: Revolutionizing Intensity insights with Heart Stress Measurement

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Revealing Secrets of the Heart with DDFA by MoniCardi

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Training Intensity in Endurance Sports

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FAQs

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Learn more about training

Suunto ZoneSense Explained

Watch the fourth episode of Suunto Training Lecture Series and learn the science behind Suunto ZoneSense!

Get ready for an ultra with Ida-Sophie Hegemann

Ultrarunner Ida-Sophie Hegemann shares her best tips for the last preparation before a long race.

Learn from your run with Hannes Namberger

Hannes Namberger shares activity data from the Lavaredo Ultra Trail 2024 – and his tips how you can learn from your races, too!

Four ways to follow your recovery with Suunto

Am I able to recover from my workouts? Is my mental recovery at the same level as physical? Do I ensure recovery with a good amount of sleep? Read on to learn how Suunto can help you in your recovery!

How to follow your progress with Suunto

The essence of training is to improve physical performance. But how do you know if you are progressing? Read on to learn how Suunto can help you.

Plan your interval workouts with Suunto app

Build a workout in Suunto app and let your watch guide you through your session!

 

See more

Interested in testing ZoneSense together with Suunto?

If you are a national team, sport scientist or pro-club interested in ZoneSense, please reach out to Suunto here.