Lean mass includes muscle, bones, ligaments, tendons, organs, other tissues and water -- in other words, everything that's not body fat. Depending on what method you use to measure your body ...

Bodybuilding legend Jay Cutler broke down winter bulking and how to add lean muscle mass without becoming overweight.

Increasing lean muscle mass is a common goal for fitness enthusiasts, athletes, and anyone looking to improve their physical health and appearance. Muscle plays a crucial role in boosting metabolic ...

A trainer outlines six of the top nutrition, workout, and lifestyle habits to help you regain and maintain muscle mass after 60.