Lie on your back with your knees bent, your feet flat on the floor or a mat at about shoulder width, and arms at your sides. Raise your hips bit by bit. It is important that you raise your hips without arching your back. Focusing on not sticking your stomach out can help you to keep from arching your back. Try to keep a straight line from your shoulders to your knees. Hold for 5 seconds. Slowly lower your hips to starting position. Do 5 repetitions.