It’s one of those common fitness misconceptions you hear all the time when it comes to weight loss and working out: “Muscle weighs more than fat.” Bad news. It’s not true. A pound is a pound — both a pound of muscle and a pound of fat weigh the same.
According to science, muscle is denser and more fibrous in nature, as it serves to help support and move your entire body. Since dense muscle tissue takes up less space than fat, you may appear slimmer than another person with the same weight and a similar height and frame because of the difference in your body composition.