Sleep deprivation
Lack of sleep has been strongly associated with weight gain in a variety of studies across all ages, though research suggests children and adolescents are particularly vulnerable. However, the exact mechanisms in which sleep deprivation leads to weight gain are diverse. Sleep deprivation is believed to have an influence on body weight in several different aspects: Sleep deprivation influences the brain's response to high-calorie food by making it more attractive, which leads to high-energy food choices, affects the production of the hormones ghreline and Leptin that control appetite and reduce physical activity levels.