Sleeping may help keep you slim

A good night's sleep may not just leave you feeling refreshed - it may also help to you keep trim.

Researchers from Ohio's Case Western Reserve University, followed nearly 70,000 women for 16 years.

They found women who slept five or fewer hours a night were a third more likely to put on at least 33lbs (15kg) than sound sleepers during that time.

It also found that lighter sleepers were 15% more likely to become obese compared with women who slept for seven hours a night.