Hammock enjoyment explained

It's not just small children who like to be rocked to sleep - even adults fall asleep faster and sleep better if rocked gently when they sleep.

The conclusion drawn by researchers at the University of Geneva in Switzerland, which had 10 men taking a nap in one of their labs.

Half of the men had beds that easily swayed, half received regular beds.

Those who were rocking fell asleep about 30 percent faster, and was longer in the deepest sleep stage, according to the study.

Scientists believe that rocking may help to synchronize signals between a part of the brain called the hypothalamus, and cortex.