Maintain muscle tissue by taking on a full body strength-training routine. Exercise your legs, arms, back, shoulders, chest and abdominal muscles. Use exercise machines at the gym, or free weights or your body weight to tone your body. Muscle tissue stimulates your metabolism even while you are resting, so you burn fat all day long.
Include the plank exercise in your abdominal strength-training routine. Come down on all fours. Lower onto your forearms and stretch out your legs behind you. Balance on the balls of your feet. Contract all your muscles including your abdominal muscles. Form a plank with your body that is parallel to the floor. Hold this position as long as you can. Aim to hold it for one minute. Perform the exercise three times.