During exercise, a fair amount of calories is spent. Furthermore, research shows that fairly vigorous exercise can raise your metabolic rate for up to 15 hours after exercise. After the age of 20, the metabolic rate of an individual drops by 5 per cent per decade due to natural muscle loss. If this muscle loss is not replaced, the person will gain weight. Strength training and weight lifting can increase the lean body mass and thus boost metabolism.
Muscles tissues are more metabolically active than fat tissues and therefore burn more calories.
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