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

Question

Quizplus · Accepted Answer

Olympic marathon runners likely have more red muscle fibers, which are more efficient at using oxygen to generate ATP for continuous, extended muscle contractions over a long time, making them better suited for endurance activities like marathons.

An Olympic Marathon Runner Probably Has More ____ Than Does