You may have heard marketing ploys for exercise supplements like “Replace fat with muscle!”. But does lifting weights literally turn fat into muscle? Not so much. Adipose (fat) and muscle are two completely different types of tissue and are no more capable of turning into one another than say, nervous or bone. You can however, burn fat and build muscle. In an article on Yahoo! Health, Joy Bauer walks through what goes on behind the scenes of fat burning.
