CrossFit athletes are realizing the benefits of supps as well. Here’s how it works: Intense performance tears down muscle tissue to support activity, so getting in a supply of aminos before and/or during training provides your body with the nutrients it needs, reducing the damage to muscle tissue. Then, getting protein immediately after a CrossFit- or bodybuilding-style weight-training workout speeds recovery, helping your muscles repair and grow so you’re fully reloaded for your next session.