However, the supine position is considered one of the worst positions for breathing issues, snoring and sleep apnea. When you sleep flat on your back, the force of gravity will pull more tissue ...

There's no question about whether sleep is important for heart and brain health. Study after study has shown that it is.

A 2011 clinical trial published in the journal Sleep Medicine, co-written by Brown, found avoiding the supine (face-up) position modestly reduced the severity of apnea in people who'd had a stroke.