Thursday, July 14, 2011

THE ROLE OF SLEEP AND YOUR WEIGHT

For most people, the evening is "down-time," used to relax, watch television, and unwind from the stresses of the day. Others view this as a time to multi-task and catch up on household chores, bills, homework, and other responsibilities.

Whether you're winding down or checking off your to-do list, unconscious eating can accompany your routine and result in a massive calorie intake. Devouring a bag of chips, a sleeve of cookies, or a pint of ice cream can occur when your mind is somewhere else.

Consuming a large amount of food before bedtime can also result in indigestion and sleep problems, which can trigger you to eat more during the proceeding days. A growing body of research suggests a connection between obesity and lack of adequate sleep. Since the 1960's, sleep duration for American adults has dropped by as much as two hours a night, while obesity has drastically increased.

Sleep is a regulator of two hormones that effect appetite, leptin and ghrelin. Leptin helps suppress food intake and stimulate energy expenditure, while ghrelin stimulates appetite, fat production, and body growth. When one is sleep deprived, the level of leptin drops and the level of ghrelin increases. The result is a drastic increase in hunger. One study reported a 24% increase in hunger, with excessive, uncontrollable cravings for calorie and carbohydrate packed foods such as cookies, candy and cake. It can all add up to a vicious cycle of late night binges, lack of adequate sleep, uncontrolled snacking, late night binges, and so on.

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