3. Sleeping naked helps prevent excess belly fat.
Natural body cooling at night helps you lower your cortisol levels. The deep sleep hours between 10 p.m. and 2 a.m. lower cortisol levels to a minimum, then after 2 a.m., the glands that produce cortisol start working more actively to prepare the body for the next day. This is so you feel energized when you wake up.
When you don’t get enough sleep, you wake up with abnormally high cortisol levels, which stimulates your appetite for comfort foods that create belly fat when eaten. Since sleeping without pajamas keeps you cooler, it helps to regulate those cortisol levels.