This is a MYTH!
Our bodies (even while sleeping) DO burn calories however, any weight loss during sleep can mostly be attributed to water weight. That being said, the main idea is that more sleep means less time to make unhealthy decisions. While that’s a smart concept, all you need is your 7-9 hours of sleep to make better decisions while you’re awake.
A rested mind allows you to think clearer, act faster, and decide smarter.