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Re:Why Seven Hours of Sleep Might Be Better Than Eight by spacehome on Tuesday July 22, 2014 @11:13AM (#8069380)
It's not just the result of poor health causing more sleep. Both can be caused by a third factor. Chronic lack of exercise causes people to sleep 9+ hours per day. Put those same people on regular aerobic exercise regimes, and they start sleeping <8 hours.

Also, it's not the most outrageous hypothesis that oversleeping directly causes health problems, too. The body is complicated and poorly understood.

Re:Why Seven Hours of Sleep Might Be Better Than Eight by bradshaw1965 on Tuesday July 22, 2014 @11:56AM (#8069629)
... Chronic lack of exercise causes people to sleep 9+ hours per day. Put those same people on regular aerobic exercise regimes, and they start sleeping <8 hours.

Peak performance exercise can demand 9+ hours of sleep. I'd be reluctant to categorize sleep needs based on exercise regime.

Re:Why Seven Hours of Sleep Might Be Better Than Eight by saraid216 on Tuesday July 22, 2014 @12:56PM (#8070024)
> I'd be reluctant to categorize sleep needs based on exercise regime.

You literally just did that.

Re:Why Seven Hours of Sleep Might Be Better Than Eight by bradshaw1965 on Tuesday July 22, 2014 @03:34PM (#8071123)
Yep. Should have expressed that it is non-linear.
Re:Why Seven Hours of Sleep Might Be Better Than Eight by tezka on Tuesday July 22, 2014 @01:16PM (#8070189)
"Chronic lack of exercise causes people to sleep 9+ hours per day."

Citation needed.

Re:Why Seven Hours of Sleep Might Be Better Than Eight by spacehome on Wednesday July 23, 2014 @03:12AM (#8073227)
Sorry, but personal experiences. Not the night of, of course, but having a habit of regular exercise.