Gravity creates pressure on your muscles and joints, gradually taking a toll on the body. When you lay down into bed, gravity pulls your body into the mattress. If your mattress presses against already-tender pressure points, or creates new pain points, you’ll want to switch your mattress. However, even the most comfortable of mattresses can’t offset gravity as well as sleeping in Zero-G can. Adjustable beds set to zero-gravity work to counteract gravity’s constant force and relieve tension throughout the body.