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POPSSleep late! Early rising not good for heart I wonder exactly how they did this study. Was there a control group of older folks that sleep late? Surely there must have been some factor that would point to the fact that early risers are not just older. Maybe there will be more details in the presentation this week. The part about sleep deprivation is interesting in either case. Lack of sleep does strange things, not just to your body, but to your mind as well.