The guy who won all the gold medals for swimming in the Olymics was a really fit, tall, lean muscular athlete but his diet was beyond the pale...stuff like three times a normal portion of bacon, eggs, fries etc for breakfast and carbohydrates, fats, etc all day long yet the exercise regime he undertook was so intense that he did not gain a pound in weight and maintained his magnificent body! I think this shows the power of exercise.