Have you ever fallen for that trick question? The truth is that 5 pounds of muscle and 5 pounds of fat weigh exactly the same -- 5 pounds! Where 5 pounds of fat and 5 pounds of muscle differ is in the amount of space they take up. See below for a great visual; then you decide which 5 pounds you would rather have!
Another important difference between muscle and fat is that muscle powers your metabolism and burns more calories than fat. Unfortunately, with many weight loss programs you lose muscle along with fat. Click here to learn more about the importance of maintaining muscle as you lose fat in a healthy, sustainable way.