It might be more than just the midnight munchies that are adding inches to your waistline. Sleep deprivation can be culprit, as well, constantly plotting to give you droopy eyes and sabotage your figure. In 1984, a sleep study revealed that people who averaged six hours of sleep per night were 27 percent more likely to be overweight than those who got seven to nine hours. And those who averaged only five hours of sleep per night were 73 percent more likely to be overweight.
When the body is forced to stay awake, it becomes very difficult for it to process blood sugar and leptin, a protein hormone that regulates appetite and metabolism. Over time, poor sleeping habits could lead to type 2 diabetes and weight gain, due to your body's decreased ability to process sugar and suppress food cravings.