What muscles are used during arm wrestling?

Primary Muscles:

1. Biceps brachii: Elbow flexion and supination

2. Brachioradialis: Elbow flexion and supination

3. Supinator: Supination

4. Pectoralis major: Adduction and internal rotation of the shoulder

5. Latissimus dorsi: Adduction and extension of the shoulder

Secondary Muscles:

1. Triceps brachii: Elbow extension and supination

2. Deltoids (anterior, lateral, posterior): Shoulder flexion, abduction, and extension

3. Trapezius (upper and middle fibers): Shoulder elevation and retraction

4. Rhomboids (major and minor): Shoulder retraction

5. Teres major: Shoulder adduction and extension