Bear and bigcats anatomy

[Pckts]

(12-06-2016, 11:19 PM)Polar Wrote: @Pckts,

Both IIa/x and IIb fibers are both fast-twitch fibers, not just IIb. But everything else is correct.

Type IIa is a mix of Type I and IIB, they are equal parts aerobic and anaerobic, while technically Fast Twitch Fibers, they are an intermediate fiber between the two.
They are used more in sustained power activities such as velocity and are more resistant to fatigue such as Type IIb


Type IIa Fibers

"These fast twitch muscle fibers are also known as intermediate fast-twitch fibers. They can use both aerobic and anaerobic metabolism almost equally to create energy. In this way, they are a combination of Type I and Type II muscle fibers."
https://www.verywell.com/fast-and-slow-t...rs-3120094 Reply