Three discrete types of muscle fibers are identified on the basis of their size, speed, and endurance. Which of the following athletic endeavors best represents the use of red fibers?
A) a sprint by an Olympic runner
B) a long, relaxing swim
C) playing baseball or basketball
D) gym climbing

Question

Quizplus · Accepted Answer

Red fibers, also known as slow-twitch fibers, have a high endurance capacity but lower speed and force production. Long, relaxing activities such as swimming can utilize these fibers for extended periods of time.

Three Discrete Types of Muscle Fibers Are Identified on the Basis