Large-scale study links abnormal sleep length to heart risk condition

When it comes to sleep, getting too much of a good thing may be a sign there's something wrong. Researchers in the U.K. have tied long sleep to metabolic syndrome, a condition that increases the risk of heart disease, diabetes and stroke.The latest study to tie excessive sleep to adverse health effects was presented as a poster this morning at SLEEP 2010.The large-scale study involved more than