Sleep Extremes Linked to Diabetes

From a Reuters article on MSNBC:

Getting too little -- or too much -- sleep may increase a person's risk of developing type 2 diabetes, new research suggests. Dr. Henry Klar Yaggi from Yale University in New Haven, Conn. and two colleagues studied the long-term (15-year) impact of sleep duration on the development of diabetes in more than 1,100 middle-aged and elderly men who were free of diabetes in 1987-1989 and were followed until 2004. Men getting no more than 6 hours of sleep per night, as well as those getting more than 8 hours of shut eye per night, were at significantly increased risk for developing diabetes, compared to men getting 7 to 8 hours of sleep each night. The risk of diabetes was roughly twofold higher in men reporting short sleep duration and more than threefold higher in those reporting long sleep duration, compared with men sleeping 7 to 8 hours nightly.