PEOPLE who sleep flat on their stomach with their body outstretched feel like they're not in control of their life.
Those who sleep in the foetal position tend to worry unnecessarily.
Sleeping with your arms outstretched indicates you want more from life and people who sleep straight like a log can seem bossy.
That's the findings of UK body language expert Robert Phipps.
Foetal sleeping was the most common position, and people who slept like that were returning to their comfort zone to de-stress themselves from the day's activities, he said.
The higher the knees and lower the head, the more internal comfort you give yourself.
"Foetal sleepers are conscientious, ordered and like things in their place, but they can over-think things and worry unnecessarily," Mr Phipps said.
The Log is the second- most common sleep position - fully extended with head, neck, arms, legs and body all stretched out in a straight line.
"The longer you sleep like this, the more rigid your thinking. You can become inflexible, making things harder for yourself," he said.
Loggers are set in their ways, liking things done their way, which can make them come across as bossy.
"Third-most common is the Yearner with arms outstretched as though you are chasing your dreams," Mr Phipps said.
"Conversely it can mean you are being chased.
"You feel you want more from life and are willing to go out there and get it with both hands."
Freefalling is the least popular and least comfortable of the positions with the body outstretched flat on the stomach, arms at right angles, hands gripping the pillow as though holding on for dear life.
"Freefallers tend to feel like life happens around them and they are just hanging on for the ride."
Mr Phipps said his research, conducted for hotel chain Premier Inn, "wasn't meant to be taken absolutely seriously".
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