Back-sleepers beware. “I know many people find it to be comfortable, because they’re not putting weight on their joints,” says Dr. Lois Krahn, a Mayo Clinic sleep specialist. But Mayo Clinic experts say sleeping on your back is actually the worst sleeping position, especially if you have sleep apnea. “Sleeping on the back means that your tongue and jaw can fall down and crowd your airway. And many people snore more on their back,” says Dr. Krahn. Sleeping on your stomach helps keep the airway open, but it can put a strain on your spine and neck. “There’s a host of evidence overall suggesting that probably sleeping on the side is better,” says Dr. Virend Somers, a cardiologist and director of the sleep facility within Mayo Clinic’s Center for Clinical and Translational Science.