Does muscle fiber type effect performance?

 

First, lets start this post off with a little info about what a muscle fiber type is.  Muscle fibers are divided into four catagories:  Type I, Type IIa, Type IIx, and Type IIb.  Type I fibers are your slow-twitch, oxidative fibers.  That means these fibers are very good at aerobic activity.  The Type II fibers are primarily fast – twitch fibers who function anaerobically.  Here’s a chart:  

 

Thanks Wikipedia

So, back to the original question, does muscle fiber type effect your performance?  Sort of.  Most people are usually 55/35.  That means they may be 55% Type II or 55% Type I.  As you can see by the chart, people who are oriented more toward Type II will tend to be better at activities that require short bursts of energy, like powerlifters, strongman competitors, olympic lifters, and sprinters.  On the flip side, people who are oriented towards Type I fibers tend to be better at activities that are aerobic in nature like marathon runners.  That being said, it doesn’t mean that you can’t train an elite powerlifter to run a marathon.  You absolutly can.  It just means they be winning the Boston Marathon anytime soon.  

For field athletes (like soccer and football) it really doesn’t effect whether you’ll be good or not as much as it efftects how you play the game.  Take for example Payton Manning vs. Micheal Vick.  Both are good quaterbacks, but obviously two very different styles of play.  

Manning

 

 

Vick

Obviously, two very different styles of play.  Without doing a biopsy, I would be willing to bet that Vick is more Type II oriented than Manning.  So, fiber orientation effects performance in that it dictates the athletes’ style of play.  Peyton can’t play like Vick and vise versa, yet both are elite level quarterbacks. 

The same could be said in other situations.  Look at Jordan vs Bird.  Jordan was explosive, Bird was not.  Both were great basketball players. 

Related posts:

  1. Sports Performance Training
  2. How To Properly Warm Up
  3. Here’s Where Your Trainer Is Getting It Wrong Part III
  4. Five Tips For Being Awesome
  5. New EFS Article: Considerations for Training Females
This entry was posted in Blog and tagged . Bookmark the permalink.
  • http://www.facebook.com/SteveLannon Steve Lannon

    How doyou explain people who arent good with dynamic banded work but still excell at big lifts? Or even people who drop the banded bench/squat and still lift big?

    • http://www.facebook.com/people/Jason-Nunn/1092622572 Jason Nunn

      Personally, I don’t do any band or chain work, but I’m also a raw lifter. I think the people who get the biggest benefit from them are geared lifters as the strength curve is upside down.

      As for the answer to your question, it could be a couple different things. Maybe their lockout strength isn’t that great and there starting strength is good enough that it carries the momentum throughout the rest of the lift, or they just aren’t explosive. Either way, it sounds like they just need to do more DE work. I would bet that it’s more of a neurological issue than one of fiber type. If so, more DE would help this person.

  • Pingback: MuscleTrainin

  • Pingback: Speed, Resistance And Endurance In One Machine

  • Pingback: Top Ten Of 2011 | Nunn's Performance Training