One aspect of modernity is the creation of sedentary jobs. Hundred years ago, nearly everybody got enough exercise because work and daily living required physical activity. A sedentary life-style is a health risk because our body needs exercise. Of the different kinds of exercise, aerobi c exercise seems to produce the greatest benefits. Exercise reduces the risk of heart diseases , one of the prime causes of death in affluent societies.
Studies also demonstrate that exercise increases life-expectancy .
Regular aerobic exercise may prolong life by 2 years. Hence, if you like exercising, it seems worthwhile. If you hate exercising, you may wonder why you should add 2 years of suffering to your life. However, the real benefits of exercise may arise from the increased health during your life rather than the increased life expectancy. Participants were assigned to three different groups.