normal heart rate during normal activity
The normal resting adult human heart rate ranges 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.During sleep a slow heartbeat with rates around 40â50 BPM is common and is considered normal.When the heart is not beating in a regular pattern, this is referred to as an arrhythmia.These abnormalities of heart rate sometimes indicate disease.radycardia is a slow heart rate, defined as below 60 bpm at rest. During sleep a slow heartbeat with rates around 40â50 BPM is common and is considered normal. When the heart is not beating in a regular pattern, this is referred to as an arrhythmia. These abnormalities of heart rate sometimes indicate disease.