http://goo.gl/Bi3T0a
Nearly three in 10 adults reported they slept an average of six hours or less a night, according to the National Health Interview Survey.
"Our data suggests a 30-minute nap can reverse the hormonal impact of a night of poor sleep," said one of the JCEM study's authors, Brice Faraut, PhD, of the Université Paris Descartes-Sorbonne Paris Cité in Paris, France. "This is the first study that found napping could restore biomarkers of neuroendocrine and immune health to normal levels."