Exercise efficiency is greater in subjects who
A) have a higher percentage of fast muscle fibers.
B) have a higher percentage of slow muscle fibers.
C) have 50% fast fibers and 50% slow fibers.

Question

Quizplus · Accepted Answer

Slow muscle fibers are more efficient at using oxygen and producing ATP through aerobic metabolism, which is the most efficient way to generate energy for muscle contractions. Therefore, individuals with a higher percentage of slow muscle fibers will have greater exercise efficiency.

Exercise Efficiency Is Greater in Subjects Who