6. Freefall

In the freefall position, a stomach sleeper has their hands on or around their pillow, with their head turned to one side. Idzikowski claims his research shows that freefall sleepers are social and can border on being brash. However, they are more sensitive and can become unsettled by criticism or extreme situations.

Of all sleep positions, stomach sleeping is the least popular. Sleep researcher Dunkell posited that stomach sleepers tend to be anxious, impulsive, compulsive, and rigid, traits he said work well for jobs in accounting, banking, and management. Similarly, researchers in 1980 and 2002 found that stomach sleepers were more likely to be anxious and less self-confident.