An Olympic marathon runner probably has more __ than does an Olympic weight lifter.
A) white muscle fibers
B) red muscle fibers
C) creatine phosphate
D) stored ATP
E) oxygen

Question

Quizplus · Accepted Answer

Marathon runners have more red muscle fibers, which are slow-twitch fibers that are more efficient at using oxygen to generate more fuel (ATP) for continuous, extended muscle contractions over a long time.

An Olympic Marathon Runner Probably Has More __ Than Does