Stomach If you prefer a prone position (lying nearly facedown), you're likely a perfectionist who is compulsive, persistent, and goal oriented, says psychiatrist Samuel Dunkell, M.D., a sleep expert in New York City.
Back Staring straight up at the ceiling can signal an adventurous, confident, and receptive personality, says Dunkell
Catching Z's on your back also keeps pressure off your jaw, which is crucial for people with painful temporomandibular joint (TMJ) disorder.
But back sleeping triggers undue stress on your airway, so it's a bad idea for snorers.
If you're a noisy breather, try the pillow trick explained above or buy a full-body pillow that will keep you on your side.
Side Some 73 percent of women and 50 percent of men spend the night on their sides.
Most curl into a semi-fetal pose, with their knees just slightly bent, says Dunkell
According to his
research, such people tend to be compromising and appeasing, whereas those who snooze in full fetal (with their knees practically hugged to their chest) are introspective and intense.