What is my max heart rate?

Your maximum heart rate determines the boundaries of all your training zones. While age-based formulas offer a starting point, your actual maximum can vary widely, making real measurement the key to accurate zones.

Why age formulas fall short

The traditional "220 minus age" formula is the most popular method because of its simplicity. However, it is just a population average, not a personal measurement[1]. The spread around it is about 10 beats per minute either way for the average person[1], which means being 20 beats above or below the estimate is entirely ordinary rather than remarkable. Two people of the same age can have maximum heart rates that are 40 beats apart, and both are completely normal. Use the age formula as a starting estimate, but aim to replace it with a real reading.

Max heart rate is not a fitness metric

A high maximum heart rate does not mean you are fitter. Unlike your resting heart rate, which drops as your heart strengthens, your maximum heart rate is determined by genetics and age. It barely changes with training[1]. Two equally fit people of the same age can have very different maximums. Measure your max heart rate simply to set your training zones accurately, not to grade your fitness.

Focus on your capacity, not your max

While training doesn't change your maximum heart rate, it dramatically improves your aerobic capacity. Active adults retain far more aerobic capacity as they age than inactive individuals[2]. Your maximum heart rate is just the ceiling of your zones; the effort you spend training within those zones is what adds healthy years to your life[3].

How to find your real max

The most reliable way to find your maximum heart rate is to measure it during a safe, genuinely all-out effort — and the all-out part is what makes it difficult. Pushing yourself to your actual limit is hard to do alone, which is why a weekly 5 km parkrun (free events hosted globally at parkrun.com) is an ideal setting: the people around you supply the effort you would not squeeze out on your own. Warm up, then run the 5k and finish it with a flat-out sprint or a hard drive up a hill to the line. The highest number your heart rate monitor records over the line is your real max, or very close to it.

Note: Always consult your doctor before performing a maximum-effort test, especially if you have any underlying health conditions.

Automatic high-water mark

You don't need to do a special test to find your max. ZonePoints automatically tracks the highest heart rate recorded during your workouts. If you exceed your current maximum during a hard session, the app will suggest updating your profile to this new peak with a single tap. Over time, your natural training efforts will refine your zones automatically. The high-water mark only ever moves up, so a bad reading sticks: if a strap glitch records a peak you know you did not reach, reset the value in your profile so a true one can take its place.

Updating your profile recalculates history

Because your maximum heart rate determines your zone boundaries, changing it shifts the threshold for every zone. When you update this value, ZonePoints will ask if you want to recalculate your past workouts. This keeps your historical data accurate and consistent. Leave past sessions unchanged only if you think the old value was genuinely right at the time and has since declined. A maximum that appears to have gone up is almost always a better measurement rather than a real change — it barely moves with training — so recalculating is usually the honest choice.

References

  1. Age-Predicted Maximal Heart Rate Revisited
    Tanaka, H., Monahan, K. D., & Seals, D. R. (2001).
    Journal of the American College of Cardiology, 37(1), 153–156
  2. Effects of Aging, Sex, and Physical Training on Cardiovascular Responses to Exercise
    Ogawa, T., Spina, R. J., Martin, W. H., Kohrt, W. M., Schechtman, K. B., Holloszy, J. O., & Ehsani, A. A. (1992).
    Circulation, 86(2), 494–503
  3. Association of Cardiorespiratory Fitness With Long-term Mortality Among Adults Undergoing Exercise Treadmill Testing
    Mandsager, K., Harb, S., Cremer, P., Phelan, D., Nissen, S. E., & Jaber, W. (2018).
    JAMA Network Open, 1(6), e183605