Physical activity and weight maintenance.

Physical activity is an important component of a weight-reducing program. When combined with a low fat diet, a physical activity program can reduce body weight by 10-15% in individuals complying with the program. However, even in disciplined individuals, resistance to lose fat ultimately occurs generally before the body composition status of the reduced-obese subjects is comparable to that of their lean counterparts. On the other hand, this weight loss is generally sufficient to normalize the risk profile regarding the development of diabetes and heart diseases. Therefore, this suggests that trying to lose weight beyond the threshold of spontaneous resistance to lose fat, may be unnecessary and not feasible. Furthermore, if one also considers the potential risks for health associated with large fat loss, it is probably not relevant to encourage further weight loss in reduced-obese individuals, when their metabolic profile is normalized. It is also important to emphasize that in such a context, the physical activity program must be maintained on a permanent basis to prevent body weight regain.