Transcript for Sleep Deprivation Leads to Weight Gain
-- -- -- -- -- -- -- -- -- So we're here on the air in the very early morning late night whatever you call -- and if we didn't. Know the difference it would -- was there. Middle of the night that's my take you're watching so presumably -- -- and that's apparently not too good for your waistline as ABC's doctor Timothy Johnson. Reports -- -- nearly 13 of Americans report getting less than six hours of sleep -- night and over 35% of Americans are obese. A study in the journal of the academy of nutrition and diet advocates suggests there may be a connection. Reviewing previous studies researchers examine the effects of partial sleep. -- find as four to six hours of sleep a night -- hormone levels in the blood. -- on -- hunger levels and eating habits. They found that partial sleep deprivation may cause you to eat more overall. Put you at risk of over eating in the evening and increase your intake of foods high in dietary fat. The authors recommend evaluating sleep patterns and trying to get enough sleep regularly. For those trying to manage their weight. I'm doctor Timothy Johnson. The there are suing -- -- -- and about a million give me lower after a similar to my best. President everybody tonight doesn't --
This transcript has been automatically generated and may not be 100% accurate.