[Physical and sports activities and aging: how to delay the state of dependence].

The ageing is a daily physical activity's reduction and after 80 years can led to dependence. The physiological factors of this evolution are: reduction of striated muscular mass, reduction of cardiac output, reduction of VO2 max from 50 ml.min-1.kg-1 at 30 years to 20 ml.min-1.kg-1 at 80 years. On average the reduction of moving functional capacity in 10% by decade. The studies show in fact that the half of reduction is due to ageing, and the other half to sedentary life. The lower limit is 15 ml.min-1.kg-1, threshold of dependence; it is an expensive and irreversible stage. To slow down the dependent people's number, it is one alone way: physical and sports activity in endurance from 55 years. With these exercise and method, the dependence is put back 10 or 20 years for anyone. We prevent the fact that we do not know cure.