Excitement during the holidays or waiting for santa to come are some of the reasons why people can’t sleep If you want to lose weight, you should get enough sleep. Don’t skip sleep just to wrap gifts or cook meals. This is unhealthy. When one lacks sleep, two hormones called leptin and ghrelin are active and interact with each other. As a result, one can gain weight. Experts says six to eight hours a day is the ideal sleeping hours. Time to grab a snooze and stay fit.