The debate about the best way to achieve a healthy weight always revolves around eating and movement. If you want to look better, the most common suggestion is “eat less and move more.” But it’s not that simple, or even accurate. Sometimes you want to eat less and move more, but it seems impossible to do so. And there might be a good reason: Between living your life, working, and exercising, you’re forgetting to sleep enough. Or maybe, more importantly, you don’t realize that sleep is the key to being rewarded for your diet and fitness efforts. According to the Centers for Disease Control and Prevention, more than 35 percent of people are sleep deprived. And when you consider that the statistic for obesity is nearly identical, it’s easy to connect the dots and discover that the connection is not a coincidence.
Not sleeping enough—less than seven hours of sleep per night—can reduce and undo the benefits of dieting, according to research published in the Annals of Internal Medicine. In the study, dieters were put on different sleep schedules. When their bodies received adequate rest, half of the weight they lost was from fat. However when they cut back on sleep, the amount of fat lost was cut in half—even though they were on the same diet. What’s more, they felt significantly hungrier, were less satisfied after meals, and lacked energy to exercise. Overall, those on a sleep-deprived diet experienced a 55 percent reduction in fat loss compared to their well-rested counterparts.