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Does my body burn calories while I sleep?

A 2009 study conducted in Sao Paulo, Brazil, found that while sleeping you burn three times more fat then when lying in bed awake. In another study, participants on identical diets that slept 5.5 hours lost lean muscle, as opposed to those sleeping 7+ hours who lost fat. And it all has to do with our stages of sleep, specifically REM sleep.

During REM sleep your brain is more active than any other stage. In fact in some cases it is more active than when you are awake. This activity requires fuel for thought called glucose -- the basic building block of most foods.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.