Losing sleep over napping
Napping for more than an hour in the day may raise the risk of Type 2 diabetes by 45%, a new study shows. Researchers at the University of Tokyo used data from 21 studies involving more than 300,000 people who had recorded their daily level of napping.They found that after 60 minutes napping appears to become harmful with the risk increasing the more time a person is asleep.The scientists believe that failing to complete a sleep cycle could be behind the increased risk."Taking short naps of less than 30 minutes helps to increase alertness and motor skills," said lead author Dr Yamada Tomahide. "A short nap finishes before the onset of deep slow-wave sleep. Entering deep slow-wave sleep and failing to complete the normal sleep cycle can result in sleep inertia."..
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