This exercise strengthens your back and abdomen muscles.

• Positioned on hands and knees, place your hands directly under your shoulders and straighten your arms.
• Tighten your belly muscles by pulling in your belly button toward your spine. Be sure you continue to breathe normally, and do not hold your breath.
• Lift your left knee and bring it toward your elbow.
• Slowly extend your leg behind you without completely straightening it. Be careful not to let your hip drop down. Avoid arching your back.
• Hold your leg behind you for about 6 seconds.
• Return to your starting position.
• Do the same exercise with your other leg.

Repeat 8 to 12 times for each leg.