We all know what you do to build muscle, right? You go to the gym, lift heavy weights, and between sets you power down your protein shake. I recently heard a comment that totally turned this on its head, and when I heard it, I knew it was right. Here is what it was: “When you are working out you are breaking down your muscles. When you are sleeping is when your body is repairing and building new muscle.” This principle of nature—the act of stressing and renewing—is so fundame