Exercise Tips and Recommendations for People with Osteoarthritis of the Knee
By CRegal

Type II muscle fibers

Type II muscle fibers

These are called "fast-twitch" muscle fibers. Type II muscles are large and used for lifting heavy loads. Type II muscles are powerful but fatigue quickly. Sprinters have an abundance of type II muscle fibers. Picture the sprinter - large muscles full of evident explosive speed. Power lifters are also replete with type II muscle fibers.

By CRegal— Last Modified: 09/28/2012, First Published: 09/02/2011