Does Exercise Correct Overweight Obesity

In the metabolic syndrome/diabetes type 2 overweight and physical inactivity are the most conspicuous problems (Fig. 4). Theoretically, overweight could be corrected by an increase of physical activity; in order to burn 0.1 kg of fat 700kcal need to be expended, i.e., 90min of bicycle exercise at an intensity of 100 Watts. Requirements to loose significant amounts of weight (>10 kg) and maintain it by exercise only are impressive: 2500 to 2800 kcal need to be expended per week requiring a minimum of 5 to 6 h of exercise at moderate levels (500 kcal/h) (30-35). It is quite obvious that only exceptionally motivated patients are willing to invest the time and the effort to achieve this goal. Moreover, as a result of excessive overweight many patients have lost the capability to undergo such demanding exercise programs. After having been inactive for the better part of their life it would be quite unrealistic to expect radical changes from patients after the age of 50. Thus, most studies relying on exercise only to reduce weight have yielded disappointing results (35,36). Long-term reduction and maintenance of weight can only be achieved by the combination of exercise and reduction of caloric intake. Even after a highly successful and promising start it is difficult for most patients to maintain it for longer periods of time, the daily routines of life slowly erode the initial success and lead to a relentless increase in body weight (37,38). Despite widespread public awareness this epidemic has spread to the younger generation; it can be safely assumed that more than 25% of the school children are overweight at the present time (39,40).

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