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Is too little sleep a cause of weight gain?

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Dr. Donald Hensrud
Aerospace Medicine

In brief: It might be

Recent studies have suggested an association between sleep duration and weight gain.
Sleeping less than five hours — or more than nine hours — a night appears to increase the likelihood of weight gain. In one study, recurrent sleep deprivation in men increased their preferences for high-calorie foods and their overall calorie intake. In another study, women who slept less than six hours a night or more than nine hours were more likely to gain 11 pounds (5 kilograms) compared with women who slept seven hours a night. Other studies have found similar patterns in children and adolescents. One explanation might be that sleep duration affects hormones regulating hunger — ghrelin and leptin — and stimulates the appetite. Another contributing factor might be that lack of sleep leads to fatigue and results in less physical activity. So now you have another reason to get a good night's sleep.

In brief: It might be

Recent studies have suggested an association between sleep duration and weight gain.
Sleeping less than five hours — or more than nine hours — a night appears to increase the likelihood of weight gain. In one study, recurrent sleep deprivation in men increased their preferences for high-calorie foods and their overall calorie intake. In another study, women who slept less than six hours a night or more than nine hours were more likely to gain 11 pounds (5 kilograms) compared with women who slept seven hours a night. Other studies have found similar patterns in children and adolescents. One explanation might be that sleep duration affects hormones regulating hunger — ghrelin and leptin — and stimulates the appetite. Another contributing factor might be that lack of sleep leads to fatigue and results in less physical activity. So now you have another reason to get a good night's sleep.
Dr. Donald Hensrud
Dr. Donald Hensrud
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