According to a Yahoo Health report your sleep habits may be more revealing than you think, according to a surprising new study. A body language expert has analyzed common sleep positions and reports that they can reveal how stressed you are. Sleep position also offers insights into such traits as bossiness, stubbornness, being self-critical, and whether people feel they’re in control of their life.

A study of 1,000 sleepers, commissioned by Premier Inns, suggest that there are basically four types of sleepers—the fetal, the log sleeper, the yearner and the freefallers.

THE FETAL POSITION-If you curl up in a ball when you sleep you are not alone.Over half of people in the study literally curl up into the fetal position when they hit the sheets. Fetal sleepers are looking for comfort and are often constant worriers. While they are very conscientious during their waking hours, these are people who tend to overthink their tasks and daily lives.

THE LOG POSITION- Do you sleep straight in a vertical line with arms at your sides?The study says nearly 30 percent of people sleep like a “log,” and may be a bit rigid when it comes to their personalities.

Those who sleep in this rigid position also often find themselves waking up stiffer and in more discomfort than when they went to bed. Their muscles may not be getting the proper rest while they sleep. Or it might mean that you have to find more of your waking hours learning how to relax.

THE YEARNER-If you reach for the stars with outstretched arms, while you sleep you are among the 25 percent of sleepers who are yearners. The yearners are people who get up in the morning with an excitement to get out there and chase their dreams.

THE FREEFALL POSITION-If you sleep face down on your stomach with arms and legs all over the bed in a freefall position, it might mean that you are seeking control of time and space in a way that you don’t feel you have in your waking hours. While only 17 percent of the people studied were considered freefallers,these are the sleepers who may be getting the least restful night’s sleep.