The misconception that muscle can be lean or bulky lies in its appearance. “When people (say ‘lean’), they’re usually ...

If your fitness goal is to up the ante on endurance, pack more power into your sprint, or supercharge your strength gains in the gym, it’s worth exploring – what are the different muscle fiber types?

Bone structure, how easily you gain muscle, and where you tend to store fat all help define your somatotype (body type). Learn how to personalize your fitness goals based on your body type.

Muscle contraction is the tightening, shortening, or lengthening of muscles when you do some activity. It can happen when you hold or pick up something, or when you stretch or exercise with weights.

Supplement companies often claim peptides can amplify muscle gain and facilitate fat loss. But few studies have explored the impact of peptides on bodybuilding, and some are banned in professional ...