[Sportsandrec] Slow twitch muscle fibers

[Kelly Thornbury]

Sorry, but what you felt has nothing to do with slow twitch muscle fiber. The only difference between a slow twitch fiber and a fast twitch fiber is the number of Z bands (contractual units) and mitochondria… The slow twitch fiber, which is generally an endurance muscle fiber, has fewer of the Z bands (less strength) and more mitochondria (able to do more aerobic respiration). 

When you are doing any exercise, like your squats for example, you are engaging both sets of muscle fibers… They are not exclusive.

There are some great books worth reading on Learning Ally by the American College of sports medicine (ACSM) on exercise physiology.

Kellee




Sent from my iPhone

> On Feb 25, 2017, at 15:09, peter acosta via SportsandRec <sportsandrec at nfbnet.org> wrote:
> 
> My first experience with slow twitch muscle fibers was while squatting at the Golds gym.
> I was on my third set of repetitions of 12 and was squatting double my bodyweight.
> On my last rep I definitely hit depth… Definitely below parallel.
> In competition the crease of the hip joint must be below the knee joint to be a valid lift. 
> Failure to do this will cause red lights from the judges 
> My legs went completely numb.
> I felt nothing.
> It was not pain, just numbness.
> I had heard of the feeling when the slow twitch fibers engage.
> This was it.
> Since I felt nothing… All I could think was up, up, up I need to get that weight back up.
> As I was thinking this through as the seconds were ticking away slowly the weight came back up.
> I racked the weight took off my belt and thanked God that I knew what was happening because I had prepared for it.
> Has anyone on the list had a similar experience?
> 
> _______________________________________________
> SportsandRec mailing list
> SportsandRec at nfbnet.org
> http://nfbnet.org/mailman/listinfo/sportsandrec_nfbnet.org
> To unsubscribe, change your list options or get your account info for SportsandRec:
> http://nfbnet.org/mailman/options/sportsandrec_nfbnet.org/kthornbury%40bresnan.net