During rapid, high-intensity exercise, your muscles use large amounts of energy in the form of a compound called adenosine triphosphate, or ATP. To allow you to keep working out, ATP stores must be replenished quickly.
Most adults have a resting heart rate of 60-100 beats per minute (bpm). The fitter you are, the lower your resting heart rate is likely to be. For example, athletes may have a resting heart rate of 40-60 bpm or lower. You should contact your GP if you think your heart rate is continuously above 120 bpm or below 40 bpm, although this could just be normal for you.
National Heart, Lung, and Blood Institute (NHLBI) guidelines now defi â¦ ne normal blood pressure as follows: * Less than 120 mm Hg systolic pressure and * Less than 80 mm Hg diastolic pressure The normal pulse for healthy adults ranges from 60 to 100 beats per minute.