THE BOTTOM LINE: Yes, you can change your muscle fiber type to become a better endurance athlete or sprinter. Researchers are still debating how much you can change through training, and whether or not the changes occur purely within the categories of slow and fast fibers (e.g. fast twitch to super fast twitch), or across slow twitch and fast twitch fibers.
Is It Possible to Change My Muscle Type? | Fitness Coach | OutsideOnline.com
