How Much is Enough?
- Many people have assumed that the benefits of physical activity are associated with physical fitness (old concept of training). Over the years, research has confirmed that health benefits come from even moderate levels of physical activity (revised concept of training.
- While additional physical activity can provide additional benefits, the rate of improvement decreases. The risks associated with higher levels of activity also increase as more activity is done.
Many people assume that exercise must be extremely vigorous for benefits to occur. Recent epidemiological studies have documented that even moderate amounts of activity are sufficient for health benefits. Larger volumes and higher intensity exercise is needed if improvements in fitness or performance are desired, but health benefits can be attained with modest amounts of activity. The graphs above illustrate these points.