(1) Harlan: "Arms": Arms On the front of the upper arms, you have the elbow flexors. Elbow flexion is moving the wrist toward the shoulder by bending the arm. The primary elbow flexors are the biceps brachii, which are actually composed of two heads, a long head and a short head. Other elbow flexors you should know about are the brachialis and brachioradialis. These muscles contribute to movement in varying degrees depending on how the elbow flexion exercise is performed. In general, the biceps brachii is worked most with a supinated(palms-up) grip, the brachioradialis with a neutral grip(palms facing each other), and the brachialis with a pronated(palms-down) grip. This is because of the leverage of each muscle at various positions and ranges of motions. The back of the upper arm is composed of the elbow extensors. Elbow extension is moving the wrist away from the shoulder by straightening the arm to form a solid line from shoulder to wrist. The primary elbow extensors consist of the three individual heads of the triceps brachii—the long head, medial head, and lateral head

On the front of the upper arms, you have the elbow flexors. Elbow flexion is moving the wrist toward the shoulder by bending the arm. The primary elbow flexors are the biceps brachii, which are actually composed of two heads, a long head and a short head. Other elbow flexors you should know about are the brachialis and brachioradialis. These muscles contribute to movement in varying degrees depending on how the elbow flexion exercise is performed. In general, the biceps brachii is worked most with a supinated(palms-up) grip, the brachioradialis with a neutral grip(palms facing each other), and the brachialis with a pronated(palms-down) grip. This is because of the leverage of each muscle at various positions and ranges of motions. The back of the upper arm is composed of the elbow extensors. Elbow extension is moving the wrist away from the shoulder by straightening the arm to form a solid line from shoulder to wrist. The primary elbow extensors consist of the three individual heads of the triceps brachii—the long head, medial head, and lateral head

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Bodyweight Strength Training Anatomy Bret Contreras

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