A concentric contraction is a type of muscle activation that causes tension on your muscle as it shortens. As your muscle shortens, it generates enough force to move an object. This is the most ...

Understand the science of lifting versus lowering to optimize your training and break through your next plateau.

Dear Dr. Donohue: Will you please explain what eccentric contractions mean? I hear it’s the best and fastest way to gain muscle size. — J.J. Dear J.J.: There are two kinds of muscle contractions — ...

Plyometric training taps into your body’s natural stretch-shortening cycle to build explosive power, speed, and agility. From vertical jumps to box jumps, these movements challenge your muscles to ...