What is a healthy resting heart rate?

A resting heart rate of 60 beats per minute or lower consistently emerges from multiple studies as the most favourable zone for cardiovascular health. Research shows that a higher resting heart rate, particularly from 80 beats per minute upward, is associated with more cardiovascular disease and higher mortality, independently of other known risk factors. These are associations, not proven cause-and-effect relationships, but the pattern is consistently visible across multiple studies¹.

The data point in the same direction for the immune system as well. In a cross-sectional study of 7,500 healthy adults, a person with a resting heart rate of 70 to 80 beats per minute had a 37% greater chance of reduced Natural Killer cell activity compared with someone whose resting heart rate was 60 or lower. At a resting heart rate of 80 or higher, that chance was even 55% greater. Natural Killer cell activity is a measure of how well the immune system is functioning. Again, this is a statistical association, not a demonstrated cause².

Regular aerobic exercise is the best-supported way to lower resting heart rate. In people aged 55 and older who led a sedentary lifestyle, resting heart rate was demonstrably reduced by aerobic training. Intensity makes a difference: training at 66% of heart rate reserve had a greater effect than training at 33%³. Broader fitness studies confirm this pattern: people with higher cardiorespiratory fitness, measured as VO2-max, consistently have a lower resting heart rate⁴.

If you want to track your resting heart rate at home with a wearable, the choice of device matters. Among the brands tested, the Oura ring (generation 3 and 4) measured nightly resting heart rate most accurately, with a deviation of less than 2% compared with an ECG. Whoop was acceptable at approximately 3% deviation, but Polar and Garmin proved less reliable. This is relevant if you want to follow trends in your resting heart rate over longer periods of time⁵.