is a normal pulse rate?
Many texts cite the normal resting adult human heart rate range from 60â100 bpm. Tachycardia is a fast heart rate, defined as above 100 bpm at rest. Bradycardia is a slow heart rate, defined as below 60 bpm at rest. Several studies, as well as expert consensus indicates that the normal resting adult heart rate is probably closer to a range between 50â90 bpm. During sleep a slow heartbeat with rates around 40â50 bpm is common and is considered normal.