Bridge exercise

Lie on your back with your knees bent and your feet flat on the floor (A). Keep your shoulders and head relaxed on the floor and tighten the muscles in your belly and buttocks. Then raise your hips to form a straight line from your knees to your shoulders (B). Try to stay that way long enough to take three deep breaths. Go back to where you started and repeat. Begin by doing five repetitions a day and slowly work up to 30.