関連ワード:  what is the normal heart beat range    what is the normal heart beat range per minute    what is the normal heart rate range    what is the normal heart rate range for an adult    what is the normal heart rate range for a fetus    what is the normal heart rate range for an infant    what is the normal heart rate range for a newborn    what is the normal heart rate range while sleeping    what is the normal heart rate range for women    what is the normal heart rate range for children