Normal heart rate varies based upon age and activity level. A resting heart rate is typically above 60 beats per minute. It changes as an individual ages. The Mayo Clinic explains that a well-trained athlete often has a lower resting heart rate, closer to 40 beats per minute.
According to the National Institutes of Health, Medline Plus, newborns have a heart rate range of 70-190 beats per minute, which decreases in variance to 80-160 beats per minute when they reach infancy. Young children generally have a heart rate of between 80-130 beats per minute, while older children generally have a heart rate in the range of 70-115 beats per minute. Children 10 years and older and adults have a heart rate of 60-100 beats per minute. Heart rate increases if one exerts himself. The Mayo Clinic says that an adult should consult a doctor if his resting heart rate consistently exceeds 100 beats per minute.