August 13, 2009 (CHICAGO) --
Genetics may explain how some people seem to have no problem going without the recommended eight hours of sleep. Researchers say they have found a rare mutation that allows certain people to get by with an average of only six hours of sleep a night.
The gene variation was found in a family where the mother and daughter naturally needed only six hours of sleep.
Though this mutation is rare in humans, the study in the journal Science suggests it could offer new leads for studying the effects of sleep on health.