I have a lot of back trouble. Did you know that ..... Sleeping on your back can put 55 lbs. of pressure on your back. Putting a couple of pillows under your knees if you sleep on your back, can cut the pressure in half. If you sleep on your side, place a pillow between your knees to reduce the pressure. Make a conscious effort to keep you spine aligned while you are in bed, from your head to your sacrum. Sleeping in a poor position is a common contributing factor to morning back pain.