ACSM Certified Personal Trainer (CPT) — Question 5

Which muscle is an antagonist of the hamstrings?

Answer options

• A. Gastrocnemius
• B. Iliopsoas
• C. Gracilis
• D. Sartorius

Correct answer: B

Explanation

The Iliopsoas is considered the antagonist of the hamstrings as it is responsible for hip flexion, countering the hip extension function of the hamstrings. The Gastrocnemius is involved in plantar flexion, the Gracilis is primarily a hip adductor, and the Sartorius aids in flexing the hip, making them less effective antagonists to the hamstrings.