Over the years I have learned that our bodies change and metabolism slows when sleep deprived. The connection between weight gain and sleep rests in our hormones! Ghrelin and leptin are hormones in which ghrelin stimulates hunger and leptin suppresses hunger. When our bodies do not get enough sleep ghrelin levels go up and leptin levels go down. Now you know why you opt for sweet and salty junk food when tired opposed to healthy alternatives.
Hormones are not the only cause for unwanted weight gain. If you don't sleep then your body is not recovering and repairing itself. Energy levels will be down causing laziness, you will not work as hard in your workouts and your brain function will be off. Learn more about lack of sleep and its connection to weight gain.
