ACSM Certified Personal Trainer (CPT) — Question 12

Downhill walking/jogging/running is characterized by eccentric activation of which of the following muscle groups?

Answer options

• A. Hamstrings
• B. Gastrocnemius
• C. Brachioradialis
• D. Quadriceps femoris

Correct answer: D

Explanation

The correct answer is D, as the quadriceps femoris is responsible for controlling the descent during downhill activities, leading to eccentric activation. The hamstrings and gastrocnemius also play roles in movement but are not primarily engaged eccentrically in this context. The brachioradialis is involved in arm movements and is not relevant to lower body activities like running or walking.