Heart rate recovery (HRR) is a measurement of your hearts ability to return to its normal, resting pace after you finish a workout. It is the difference between your peak heart rate during exercise and your heart rate soon after you stop. HRR is measured in beats per minute (bpm) and is helpful for diagnosing and managing cardiovascular disease. Some people also calculate this number on their own to gauge their physical fitness. Healthcare providers calculate your HRR when you undergo an exercise stress test. HRR is different from heart rate reserve (HRR), which is the difference between your maximum (peak) heart rate and your resting heart rate. Heart rate reserve is one way to tell how fit you are, and the calculation comes from subtracting your resting heart rate from your maximum heart rate. The more fit you are, the lower your resting heart rate will be, and when you have a low resting heart rate, your heart rate reserve is high. HRR is a measure of physical fitness and relates to the risk of several health conditions. Your HRR value can be used as an indication of your aerobic fitness, and it can provide insight into your cardiovascular health and future risk of cardiovascular disease and mortality.