Under normal circumstances, a heartbeat of 60-100 beats per minute is considered normal, and the heartbeat will change with age. In addition, the heartbeat is also related to gender, the body’s mental state, nutritional status, circadian rhythms, and temperature changes. In general, the heartbeat of men is significantly lower than that of women, and the heartbeat of the elderly is significantly lower than that of the young. In addition, the same person’s heart rate will be relatively slower at night when he/she is asleep, and the heart rate will increase significantly when he/she is exercising or excited, but it is normal to have a heart rate of 60-100 beats per minute in a quiet state.