Maximum heart rate is not a number you should aim to increase. Instead, it is an important parameter that helps Suunto better understand your body and training status.
Table of Contents:
- What Is Maximum Heart Rate?
- Why Is Maximum Heart Rate Important?
- What Is the Difference Between Maximum Heart Rate and Resting Heart Rate?
- Why Is “220 - Age” Only a Starting Point?
- How to Find and Set Your Maximum Heart Rate on Suunto?
- How to Change Your Maximum Heart Rate Settings on Your Suunto Watch
- How to Know When to Adjust Your Maximum Heart Rate Setting in Suunto
- FAQ
What Is Maximum Heart Rate?
Maximum heart rate (Max HR) refers to the highest number of heartbeats per minute that your body can reach during near-maximal effort exercise.
As exercise intensity increases, your body requires more oxygen, and your heart gradually beats faster until it approaches your individual maximum heart rate.
Maximum heart rate varies from person to person. Even people of the same age and similar training levels can have significantly different maximum heart rates. Therefore, understanding your own maximum heart rate is more meaningful than comparing this number with others.
Why Is Maximum Heart Rate Important?
Maximum heart rate is one of the key personal metrics Suunto uses to understand your training intensity. By combining your Max HR, workout data, resting heart rate, and other physiological information, Suunto can help evaluate your training load and provide more personalized training feedback.
Maximum heart rate is not a performance score or a number to compare with others. Instead, it is a personal physiological reference value that helps your training device better understand your body and provide more meaningful insights.
What Is the Difference Between Maximum Heart Rate and Resting Heart Rate?
Maximum Heart Rate (Max HR) and Resting Heart Rate (Rest HR) reflect different aspects of your cardiovascular system under different conditions.
- Maximum Heart Rate represents the highest heart rate your body can reach during near-maximal effort exercise. It is mainly used to help understand exercise intensity and allows your Suunto watch to better evaluate training load and workout intensity.
- Resting Heart Rate represents your heart rate when your body is fully relaxed, typically measured after waking up in the morning or during sleep. Compared with maximum heart rate, resting heart rate is more easily affected by daily factors such as sleep quality, stress, illness, recovery status, and training load.
For Suunto users, setting accurate maximum heart rate and resting heart rate values helps the device better understand your overall physiological state and provide more personalized training feedback.
For example, maximum heart rate affects how the watch evaluates exercise intensity, while resting heart rate can provide insights into recovery status and changes in physical stress. If your resting heart rate remains consistently higher than your normal baseline, it may indicate that your body is under additional stress and that you may need to adjust your training plan accordingly.
Why Is “220 - Age” Only a Starting Point?
“220 - age” is one of the most commonly used formulas for estimating maximum heart rate (Max HR). However, it only provides a general reference and cannot accurately predict an individual’s true maximum heart rate.
This is because maximum heart rate varies significantly between individuals. People of the same age can have very different maximum heart rates. These differences are influenced not only by age, but also by factors such as genetics, heart structure, autonomic nervous system regulation, and long-term training adaptations.
For example, endurance training can lead to cardiovascular adaptations. After long-term training, an athlete’s heart may develop a higher stroke volume, allowing the body to pump more blood with each heartbeat. As a result, the body can deliver more oxygen at a lower or similar heart rate. Therefore, maximum heart rate alone does not represent an individual’s athletic ability, and a higher Max HR is not necessarily better.
In addition, the autonomic nervous system plays an important role in heart rate regulation. The sympathetic nervous system increases heart rate during exercise, while the parasympathetic nervous system helps the body recover and lower heart rate. Differences in nervous system regulation can also affect the maximum heart rate a person can reach during all-out efforts.
Parasympathetic activity is also related to Heart Rate Variability (HRV). HRV reflects variations in the time intervals between heartbeats and can provide insights into recovery, stress levels, and overall physical condition. Suunto watches can track HRV during sleep, providing additional information to help users better understand their body status.
Therefore, maximum heart rate cannot be accurately determined simply by age or a single formula. Age-based formulas only provide an estimate based on population averages. Your true maximum heart rate should be determined through a combination of actual testing, long-term training data, and reliable heart rate measurements.
How to Find and Set Your Maximum Heart Rate on Suunto?
For new users, Suunto uses an age-based estimation method to set your maximum heart rate by default:
Maximum Heart Rate = 220 - Age
For example, for a 40-year-old athlete:
220 - 40 = 180 bpm (beats per minute)
This estimate can serve as a starting point when you begin using your watch.
However, the 220 - Age formula only provides a general reference and may not accurately represent your true maximum heart rate. If you want a more accurate value, you can use the following methods:
Review Long-Term Training Data
Your Suunto training records can provide valuable insights. By reviewing your heart rate performance during high-intensity workouts, races, and different sport modes, you can evaluate whether your current Max HR setting is appropriate.
Perform a Maximum Heart Rate Test
If you want a more accurate estimate of your maximum heart rate, you can perform a maximum heart rate test.
Ideally, the test should be completed in your primary sport:
- Runners should perform a running-based test.
- Cyclists should perform a cycling-based test.
- Swimmers should perform a swimming-based test.
Common Maximum Heart Rate Testing Methods:
1.All-Out 5K Test
For runners, a well-paced 5K effort performed close to maximum intensity is one of the easier methods to estimate maximum heart rate.
Suggested protocol:
- Warm up for 10–15 minutes.
- Start at a high but sustainable intensity.
- Push as hard as possible during the final stage.
- Check the highest heart rate recorded during the activity.
Because a 5K effort keeps the body under high physiological stress for an extended period, the peak heart rate reached near the finish can often be used as a reference for maximum heart rate.
2.Hill Repeat Test
Another common method is performing repeated uphill efforts.
For example:
- Choose an uphill section with a gradient of around 7–8%.
- Run uphill at maximum effort.
- Walk back downhill for recovery.
- Repeat until your peak heart rate no longer increases.
Compared with flat sprints, uphill efforts reduce running speed while increasing cardiovascular demand, making it easier to approach maximum effort safely and gradually.
3.Laboratory Maximum Effort Test
For the most accurate measurement, a laboratory test can be performed.
Laboratories typically use a graded exercise test (GXT):
- Exercise is performed on a treadmill or cycling ergometer while the workload gradually increases.
- The test continues until the participant reaches exhaustion.
- Heart rate, breathing, and oxygen consumption are monitored throughout the test.
The highest heart rate reached during the test can be used as a reliable reference for maximum heart rate.
Maximum heart rate values may vary slightly between different sports. For example, running tests typically produce a slightly higher maximum heart rate compared with cycling or swimming tests.
Maximum heart rate testing requires a near-maximal effort, so it is more suitable for individuals with some training experience. If you are new to exercise or have health concerns, it is recommended to perform high-intensity testing under professional guidance.
Once you obtain a more reliable maximum heart rate value, you can manually update this setting on your Suunto watch to make training feedback better match your actual physiological profile.
How to Change Your Maximum Heart Rate Settings on Your Suunto Watch
If you know your actual maximum heart rate, you can manually update it in your Suunto settings.
In the Suunto app:
My Suunto → Settings → Personal information → Maximum Heart Rate
You can also adjust this setting directly on your watch:
For most Suunto watches (except Suunto Run):
Settings → General → Personal → Maximum Heart Rate
For Suunto Run:
Settings → Activity & Training → Intensity Zones → Heart Rate Zones
Updating your maximum heart rate setting helps ensure that your training feedback and heart rate zone calculations are based on more accurate personal data.
Maximum heart rate is not just an isolated number. It directly affects how your Suunto watch evaluates training intensity and determines your .
If your maximum heart rate is set too low, you may enter higher-intensity heart rate zones more easily, causing your training intensity to be overestimated. If it is set too high, the same heart rate may be classified as a lower-intensity zone, which can lead to underestimating training load.
By regularly reviewing and updating your maximum heart rate setting, you can help Suunto more accurately interpret your exercise intensity, making training analysis, heart rate zones, and related feedback better reflect your actual physiological state.
How to Know When to Adjust Your Maximum Heart Rate Setting in Suunto
Maximum heart rate is not a permanently fixed number. As your age, training experience, and physical condition change, it is worth periodically checking whether your current Max HR setting still reflects your actual situation.
You may want to reassess your maximum heart rate setting if:
- You repeatedly reach or exceed your current Max HR during high-intensity workouts;
- You have completed a professional test or a reliable maximum heart rate test and obtained new reference data;
- The training intensity shown by your watch consistently does not match your actual perception of effort;
- You start participating in a new sport, such as transitioning from single-sport running to triathlon training.
When adjusting your Max HR, it is recommended to consider long-term trends from your Suunto training records, multiple workout data points, and reliable test results, rather than changing the setting based on a single unusually high heart rate reading.
FAQ
Is the “220 - Age” Maximum Heart Rate Formula Accurate?
The 220 - Age formula is a simple and widely used method for estimating maximum heart rate, but it cannot accurately predict the true maximum heart rate for everyone.
This formula is based on population averages, so it is better used as a general reference rather than an exact personal measurement.
Factors such as genetics, heart structure, cardiovascular efficiency, autonomic nervous system regulation, and long-term training adaptations can all influence an individual’s maximum heart rate.
For more accurate results, you can combine reliable training data, maximum heart rate testing, or professional assessments to determine a more suitable Max HR value.
Can a Suunto Watch Measure My True Maximum Heart Rate?
A Suunto watch can record the highest heart rate you reach during exercise, and this data can provide an important reference when evaluating your maximum heart rate.
However, the highest heart rate recorded during a workout does not necessarily equal your true maximum heart rate. Factors such as measurement conditions, exercise type, fatigue level, and sensor performance can all affect the final reading.
A more accurate maximum heart rate value usually requires a structured maximal effort test or laboratory-based assessment.
Should I Adjust My Maximum Heart Rate Setting in Suunto?
If you have obtained your true maximum heart rate through testing, or if your long-term training data shows that your current setting does not match your actual performance, you may consider adjusting your Max HR setting in Suunto.
For example:
- You consistently exceed your current Max HR setting during multiple high-intensity workouts;
- Your perceived effort does not match the training intensity shown by your watch over a long period;
- You have completed a professional test or a reliable field test.
However, it is not recommended to change your setting based only on a single unusual heart rate peak. A more reliable approach is to make adjustments based on long-term data and repeated observations.
Is a Higher Maximum Heart Rate Better?
No. Maximum heart rate is not a measure of fitness or athletic ability.
Even people of the same age and with similar training backgrounds can have very different maximum heart rates. A higher Max HR does not mean better performance, and a lower Max HR does not mean poorer endurance.
Exercise performance depends on many factors, including cardiac efficiency, oxygen utilization capacity, training level, and overall physical condition.
How Often Should I Update My Maximum Heart Rate?
You do not need to update your maximum heart rate every day.
It is recommended to reassess your Max HR when:
- You complete a reliable maximum heart rate test;
- Your training plan changes significantly;
- Long-term training data shows that your current Max HR setting no longer reflects your actual performance.
Keeping your Max HR setting accurate helps your Suunto watch provide more reliable training feedback.
Should I Use Wrist Heart Rate or a Heart Rate Belt When Testing Maximum Heart Rate?
For daily training, wrist-based optical heart rate monitoring provides a convenient way to track heart rate data.
However, during maximum-intensity workouts or maximum heart rate testing, a heart rate belt can usually provide more stable and reliable measurements. Factors such as rapid wrist movement, cold temperatures, and watch fit can affect optical heart rate sensor performance.
For high-intensity training or testing scenarios, pairing your Suunto watch with a heart rate belt can help you obtain more reliable heart rate data.