The normal vital sign values change with aging. Temperature regulation, however, is more difficult. Because of changes in the heart, the resting heart rate may become slightly slower. It takes longer for the pulse to speed up when exercising, and longer to slow back down after exercise . The maximum heart rate reached with exercise is less.
Blood vessels become less elastic.
The blood vessels respond slower to a change in body position. Although lung function decreases slightly, changes are usually only in the reserve function. The rate of breathing usually does not change. Many older people find that they need to wear layers of clothing in order to feel warm. Keeping cool is also more difficult.