While that’s unlikely, you can speed up your k-calorie burning, that small motor online sports betting in your body that burns calories. As you age, your metabolic process decreases, chiefly because you lose around a half pound of muscle tissue each year. „if you do not make use of the muscle mass, it atrophies,“ explains Pamela Peeke, M.D., professor of medication at the University of Maryland and writer of Fight Fat After Forty.