Well, we have another explanation on why modern people are gaining weight. Do you know how much weight a lack of sleep causes you to gain? 2 pounds a week. 2 pounds in a week seems like a lot, right? According to The Daily Mail:
In the latest paper, which is published in Proceedings of the National Academy of Sciences, researchers showed that while staying awake longer requires more energy, the amount of food participants ate more than offset the extra calories burned.
Professor Wright said: ‘Just getting less sleep by itself is not going to lead to weight gain. But when people get insufficient sleep it leads them to eat more than they actually need.’