Quick answer: because with the diminishing estrogen and testosterone they lose muscle, gain more fat, flab and lose shape. Seeing the number on the scale creep up as they grow older they panic and resort to yo-yo diets, not understanding that such dieting ultimately causes them to regain those pounds in the form of fat. ‘Laziness is a big cause of muscle loss. You don’t use it you lose it ‘ – heard that before, right? You see, muscle helps burn calories, and it acts as a s