CanFitPro Personal Training Specialist Test 2025 – 400 Free Practice Questions to Pass the Exam

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What does the sliding filament theory describe?

Compression of the lumbar spine

Enclosure of muscle fiber contents

Muscle contraction through filament sliding

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.

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Connective tissue around fascicles

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