Does the heart rate change with age?
Yes, the heart rate change with age is progressive, but downwards. Heart rate decreases as the baby grows up. This probably has something to do with the size. The heart of the humming bird beats about 1500 times per minute while that of an elephant beats about 30 to 40 per minute. Average adult human heart beats at around 72 per minute while a newborn infant’s heart beats at about 140 per minute.