AFAA Personal Trainer Certification 2026 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 415

Which muscle group opposes the biceps?

Triceps

The triceps are the muscle group that opposes the biceps. This is because the biceps and triceps are classified as antagonistic muscles, meaning they work in opposition to each other to facilitate movement at a joint, primarily the elbow. When the biceps contract to flex the elbow, the triceps must relax to allow this movement. Conversely, when the triceps contract to extend the elbow, the biceps must relax. This opposing relationship is essential for joint stability and coordinated movement.

The other muscles listed do not directly oppose the actions of the biceps at the elbow. The latissimus dorsi is primarily involved in movements of the shoulder, the anterior deltoids are also connected to shoulder movement, and the pectoralis major primarily assists with movements of the upper arm and chest. Therefore, none of these muscles fulfill the role of opposing the biceps specifically during elbow flexion and extension.

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Latissimus Dorsi

Anterior Deltoids

Pectoralis Major

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