Which fibers dominate many of the back and calf muscles that contract almost continually to maintain posture?
A)Slow
B)Fast
C)Intermediate

Question

Quizplus · Accepted Answer

Slow fibers, also known as type I fibers, are usually found in muscles that are responsible for maintaining posture, such as the back and calf muscles. These fibers have a high endurance capacity and are resistant to fatigue, allowing them to contract almost continually to maintain posture. In contrast, fast fibers (type IIa and IIb) are better suited for generating quick bursts of force and are more easily fatigued. Intermediate fibers are a mix of both slow and fast fiber characteristics.

Which Fibers Dominate Many of the Back and Calf Muscles