CanFitPro Personal Training Specialist Practice Test 2026 - Free Personal Training Specialist Practice Questions and Study Guide

The sliding filament theory is a well-established explanation for how skeletal muscle contraction occurs. It describes the process by which muscle fibers actively slide past each other, causing muscle contractions and movement. Option A is incorrect because it refers to a different physiological concept related to the spine. Option B is incorrect because it does not accurately describe the process of muscle contraction. Option D is incorrect because it references connective tissue, which is not directly involved in the sliding filament theory of muscle contraction.