On May 23, 1:17 pm, Prisoner at War <prisoner_at_...@yahoo.com> wrote:
> Are there really some muscles which are harder to train? Which ones?
> Why?
>
> No matter how hard you work out your arms, they'll never be as big as
> your legs, because the muscles involved are different types, "white"
> and "red" fiber??
it's not because legs or arms have a higher percentage of fast twitch
fibers...it's because legs have a higher number of muscle fibers.
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