"8 hours for example is TOO MUCH according to recent studies and can be dangerous."
LOL. You made the claim, Grand Poobah. The onus is on you to cite the study (no CNN editing, either). You're the 20,000+ post genius. Should be a snap. What do Phd's studying this shit for decades know? They're mere idiots compared to you. In fact, I don't understand why they don't submit their studies to the Bluto Institute for review before they send it on to any learned society or journal.
/you'll find that one study will indicate one thing, another will indicate it's opposite, particularly when studies are being driven by policy agendae. this is an area where there are guidelines but no fixed dilineations.
"Researchers at the University of Warwick's Warwick Medical School studied 10,308 British civil servants in two different time periods: between 1985 and 1988, and between 1992 and 1993.
With seven hours seen as the optimal amount of sleep for the average adult, the study subjects who cut the duration of their sleep from seven hours to five hours a night had a 1.7-fold increased risk of death from all causes within the ensuing 11-17 years, according to the research, presented Monday to the British Sleep Society.
More surprisingly, scientists found those individuals who increased the number of hours they slept per night from seven to eight hours or more were more than twice as likely to die within 11-17 years as those who kept sleeping for seven."
Professor Francesco Cappuccio

The research paper entitled: “A prospective study of change in sleep duration; associations with mortality in the Whitehall II cohort” will be published in the Journal SLEEP (it is already available in the online version of the journal), and the full list of the authors is: Jane E. Ferrie, Martin J. Shipley, Francesco P. Cappuccio, Eric Brunner, Michelle A. Miller, Meena Kumari, and Michael G. Marmot.
24th Sept 2007