obesity -3 / “Exercise leading to fitness and weight management” is a reflection of body’s metabolic statement to exercises:

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There is direct influence of physical activity on the underlying metabolic determinants of energy balance. Physical activity facilitates weight maintenance through direct energy expenditure and improved physical fitness. The latter facilitates the amount and intensity of daily activities. Both components are of importance in relation to energy and substrate balance. Exercise may act as a substitute for an enlarged fat mass, in bringing about rates of fat oxidation commensurate with fat intake. Metabolic effects on lipid mobilization and oxidation and morphological/biochemical changes in the muscle fiber, contribute to this successful regulation of body weight. A limited number of studies indicate that, the minimal level of additional energy expenditure by physical exercise required for protection against gain in excessive body fatness, is around 12 kcal/kg body weight/d.

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