Suunto has recently launched its latest innovation, the Suunto ZoneSense technology – a pioneering advancement in endurance training. ZoneSense uses novel heart rate variability (HRV) features to accurately detect exercise intensity, giving athletes real-time insights into their training.
In endurance training, the correct intensity of each workout is crucial for achieving optimal results. Historically, athletes have faced challenges to follow workout intensity accurately on a daily basis. Traditional methods often require invasive and cumbersome testing protocols including, for example, blood samples or gas masks, which make them impractical for daily use. Additionally, the training intensity levels are changing on a daily basis, differing between different sports, and are impacted by various external factor such as heat and altitude, making it very difficult to follow if an athlete is working out in desired effort level.
ZoneSense technology addresses these challenges by leveraging advanced HRV analysis to measure the stress levels of the heart during exercise. Using features discovered with Dynamical Detrended Fluctuation Analysis (DDFA), ZoneSense correlates these stress levels with metabolic states, such as aerobic and anaerobic thresholds. This allows athletes to accurately gauge their effort and intensity levels without the need for personal calibration or external testing.
This marks the first time that this patented technology is being used in a wearable device. To be able to use Zonesense, a heart rate belt is required. ZoneSense is now available for all Suunto watch owners through after-analysis in the Suunto App. Live measurements are available on the latest Suunto models: Suunto Race S, Suunto Race, Suunto 9 Peak Pro and Suunto Vertical.
Suunto ZoneSense, summarized:
- Provides real intensity measurement
- Know your Aerobic, an-aerobic and Vo2 effort
- Made for all endurance sports, without lab tests
- Free analysis for all Suunto users in app
- Live metrics with latest watches
- Simply pair your watch with a hr belt and you are ready to go!

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