Bad news for those who love a good lie-in: a new study finds that people who get out of bed by 7 a.m., on average, do better in the workplace and have a lower chance of being depressed, stressed and overweight.

"Morning people tend to be healthier and happier as well as having lower body mass indices," researcher Dr. Joerg Huber of Roehampton University in London said in a British Psychological Society conference, according to the UK's Telegraph last week.