AREAS OF INTEREST: METABOLISM, MUSCLE, ENERGY, FIBER TYPES, OLDER ATHLETES, CHOLESTEROL, DIABETES. by: Tom Seabourne Ph. D Your body loses about six pounds of muscle per decade. With less muscle your body burns fewer calories. You require less food, but if you eat the same as you did when you were younger, you will gain fat. Muscle is the engine for your … [Read more...] about YOUR MUSCLE IS THE ENGINE FOR YOUR METABOLISM