The measurement of the heart rate, or the number of times the heart beats per minute<|>A normal resting heart rate should be between 60 to 100 beats per minute, but it can vary from minute to minute<|>Females ages 12 and older, in general, tend to have faster heart rates than do males<|>Athletes, such as runners, who do a lot of cardiovascular conditioning, may have heart rates near 40 beats per minute and experience no problems