Does just being under the hot sun burn calories?
Yes, your body does burn calories keeping you cool. Everything burns calories – even drinking cold water (your body spends energy heating it up to body tempurature). They eat less because they need less fat. Fat is insulating, which means it holds heat. Also, people move less when it’s hot. Staying still helps you keep cool. So the calories you’re saving by not moving as much are greater than the calories your body spends by trying to keep you cool.
