The proposed sleeping position involves leaning forward and placing your head on the pillow's sloped top.

WSJ: The Best Travel Pillows: Desperately Seeking Slumber

When people want stress relief, they tend to go for massage-the manipulation of muscles, the prone sleeping position and the feel of another's hands all create a comforting environment.

FORBES: Water, Water Everywhere

Dr Drucker, whose has also examined why smoking and sleeping position are risk factors for SIDS, says this latest research will help establish the cause of death in certain cases.

BBC: Baby asleep on its back

This experiment does, however, suggest that genetics alone may explain some cases of SIDS. In the past, explanations have concentrated on environmental factors such as the smoking habits of the parents, bacterial infection and (most famously) a baby's sleeping position.

ECONOMIST: Sudden infant death syndrome

Dr. Wilmarth said that always sleeping in the same position can cause problems.

WSJ: Find the Perfect Sleep Position

Previously it had been thought that problems such as snoring were probably due to factors such as being overweight, or sleeping in the wrong position.

BBC: NEWS | Health | Genes to blame for restless sleep

"The plantar fascia is in a relaxed position when you're sleeping, " says Jacqueline Sutera, a podiatric surgeon in New York City.

CNN: Why your feet hurt

The new ones (bottles) came at a time when his position was that he was sleeping in the living room next to his mother, or something like that.

BBC: Mitchell's urine habit 'relevant'

Each sleep position has benefits and disadvantages, although sleeping on the stomach generally isn't recommended because it can constrain the neck.

WSJ: Find the Perfect Sleep Position