Which of the following is true about fast-twitch muscle fibers? A.
They can deliver a lot of power for a long time.

B.
They contract very quickly.

C.
They are found only in elite athletes.

D.
They only twitch when you are nervous.

B ofc

Explanation:

B

Explanation:

because they use anerobic metabolism to ceate fuel and they are better at generating short busts of strength or speed than slow muscles

B

Explanation:

It's B I recently read an article on it :))

teens need 8-10 hours of sleep. it kind of depends on what time you get up. but prob around 10 or 11 p.m. or 11 or 11: 30 p.m.

when i got mine it was about a 6 or 7