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Need for exercise

Ref ----26/8/2010 -----Hindu /Chennai

Exercising is necessary

                            Increase in obesity has become one of the most important clinical-epidemiological phenomena. Factors such as changing eating habits and a sedentary lifestyle both have a role in the pathogenesis of this disease. It is postulated that excessive consumption of fat creates failures in the signal transmitted by neurons controlling satiety in a region of the brain called the hypothalamus. These failures can lead to uncontrollable food intake and, consequently, obesity.

                          There is now another good reason to exercise. Besides burning calories, exercise restores the sensitivity of neurons involved in the control of satiety (feeling full), which in turn contributes to reduced food intake and consequently weight loss.This is the conclusion of a study led by Brazilian re-searchers at the University of Campinas. Sure may bring hope to over 40 per cent of the 'population that suffers from weight   problems and obesity around the world.

                         Exercising restored signals and restored satiety in hypothalamic neurons and decreased food intake. "In obese animals, exercise increased IL-6 and IL-1O protein levels in the hypothalamus, and these molecules were crucial for increasing the sensitivity of the' most important hormones, insulin and leptin, which control appetite.

                       Physical activity contributes to the prevention and treatment of obesity, not only by increasing energy expenditure but also by modulating the signals of satiety and reducing food intake.Physical activity has always been considered a cornerstone in the treatment of obesity, however, only now have the effects of exercise on the control of body weight been understood.  

                       Thus, these findings, be sides reinforcing the necessity for regular exercise also change the current paradigm established between physical activity and weight loss.