Sleeping elevated can improve snoring, symptoms of sleep apnea, acid reflux, lower back pain, and more. However, sleeping elevated on an adjustable bed or a wedge pillow is only suited for back and side sleepers. Also, zero gravity sleeping is only effective and comfortable when you sleep on your back. Although stomach sleeping is the worst sleeping position for your back, if you choose to sleep this way, you cannot comfortably nor safely do so while elevated. Your body would be twisted awkwardly and only lead to pain.