ACSM Personal Trainer Certification Practice Exam

What primary joint movement is involved in a tricep kickback?

1. Elbow extension

2. Shoulder extension

3. Shoulder abduction

4. Elbow flexion

The correct answer is: Elbow extension

The primary joint movement involved in a tricep kickback is elbow extension. During this exercise, the individual typically bends forward at the hips while holding a weight in one hand. As the movement begins, the elbow is positioned at approximately a 90-degree angle. The exercise is executed by extending the elbow, effectively straightening the arm behind the body and engaging the triceps muscle. Elbow extension is the key action in this movement, as it specifically targets the triceps brachii, the muscle responsible for straightening the arm. This is essential for developing strength and definition in the muscle group. While other movements such as shoulder extension or abduction occur to some degree during the exercise, they are not the primary focus of the tricep kickback. The elbow flexion mentioned in another option relates to the initial position of the arm but does not represent the primary movement being executed during the kickback phase. Understanding the mechanics of this exercise highlights how isolating specific muscle groups through targeted movements like elbow extension is fundamental in resistance training, especially for the upper body.