what muscle fibers is dominant { if any } neurotype 3 ?
What are the differences between neurotypes fast vs slow fibers percentage ?
appreciated all thoughts .thnx
It is not always a perfect relationship because of genetic factors.
While most Type 3 have a higher ratio of ST fibers, Type 1 a higher ratio of FT fibers and Type 2 being more equally mixed, there are exceptions.
If a Type 3 has the ACTN3 RR genotype he will be fast twitch dominant and if the Type 1 has the ACTN3 XX genotype he will be slow twitch dominant. So you cannot assume with 100% certainty that someone will be slow twitch dominant if he is Type 3.
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it’s interesting that type 1 has ACTN3 XX, I can’t imagine how that person would be
Just out of curiosity CT, do you use Athletic performance tests on your athletes to identify their ACE and ACTN3 gene variants?
If yes, is there a gene test that you recommend (for example one that can be send by post for a buccal sample)?
Extremely extroverted, confident and competitive. But not explosive or strong. A lot of elite endurance athletes would fall in that category.
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CT,could be type /intensity or endurance / of training change fiber type ?
and what is diet role to ACTN3 XX / expected carb sensitivity / ?
thank you
If 1B has ACTN XX, can he tolerate laclate better than regular 1B?
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It’s mostly that he will produce less lactate/hydrogen ions (the real issue is not the lactate/lactic acid… it’s not what causes the “burn”, but hydrogen ions, which changes the ph of the muscle making it more acidic… but both happen at the same time).
The more fast-twitch dominant and the better is the mind-muscle connection (more acetylcholine increases/improves mind-muscle connection capacity) the more lactate/hydrogen ions you produce.
A typical 1B has both a high ratio of FT fibers and high acetylcholine (thus good mind-muscle connection). A 1B with the ACTN3 XX variant will have more ST fibers, so yeah, they will produce less lactate/hydrogen ions.
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