The importance of getting enough quality sleep can not be overstated. It may be just as important as diet and exercise, if not more. Poor sleep can drive insulin resistance, throw your appetite hormones out of whack and reduce your physical and mental performance. What’s more, it is one of the strongest individual risk factors for future weight gain and obesity. One study showed that short sleep was linked to 89% increased risk of obesity in children, and 55% in adults.