ACSM Certified Personal Trainer (CPT) — Question 17

What muscle extends the forearm?

Answer options

• A. Supinator teres
• B. Pronator teres
• C. Biceps brachii
• D. Triceps brachii

Correct answer: D

Explanation

The Triceps brachii is the main muscle that extends the forearm at the elbow joint, making it the correct answer. The Supinator teres and Pronator teres are involved in pronation and supination of the forearm, while the Biceps brachii primarily flexes the forearm.