In fact, in recent years results from various studies  have shown that there is a connection between sleep duration and the risk of being overweight. This can be attributed to both physical and behavioral causes [1]. A team of researchers led by Orfeu M. Buxton from the Harvard Medical School in Boston reported a reduction in resting metabolism and a reduced effect of insulin [2]. The sleep deficit also has an impact on the appetite-regulating hormone leptin [3]. With regard to eating behavior, the scientist Dr. Jean-Philippe Chaput from the University of Ottawa states that longer periods of being awake lead to more appetite and cravings, and thus often result in an increased calorie intake [4]. Those who chronically do not get enough sleep feel exhausted and tired. Therefore they move less and are more likely to refrain from exercising.  Those who are awake for longer have more time to eat [5]. So remember: Maybe it is a good idea to exchange the next TV night and the bag of chips that comes with it  for a few more relaxing and healthy hours of sleep.