Manage Fatigue in a Nonstop World With a Nap - NYTimes.com: " . . . For all but the tiniest minority – perhaps 2 or 3 percent – “enough” means seven to eight hours. Almost no one can sleep fewer than five hours and feel fully rested, but we don’t necessarily recognize that limitation. Many among us are so chronically sleep deprived that we’ve lost the connection to what it feels like to be fully rested – and how much more that would make possible in our lives. But a growing body of research suggests that even short naps can be a powerful and highly efficient way to temporarily compensate for an inadequate night’s sleep, specifically in the hours following the nap. The exception is among those who are already severely sleep deprived. . . ." (read more at link above)
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