ACSM Personal Trainer Certification Practice Exam

Which muscle group is primarily involved in adduction at the hip joint?

1. Adductor muscle group

2. Quadriceps

3. Hamstrings

4. Gluteus maximus

The correct answer is: Adductor muscle group

The adductor muscle group is the primary muscle group responsible for adduction at the hip joint. This group includes several muscles located in the inner thigh, specifically the adductor longus, adductor brevis, adductor magnus, and gracilis. These muscles work together to bring the leg closer to the midline of the body, which is the key movement defined as adduction. Understanding the function of the adductor muscles is essential for personal trainers, as these muscles play a crucial role in various movements, including walking, running, and performing exercises that involve lateral movements. Proper activation and strengthening of this muscle group can also help in preventing injuries and improving performance in activities that require stability and balance. The other muscle groups mentioned in the options, such as the quadriceps, hamstrings, and gluteus maximus, are involved in different movements around the hip joint. The quadriceps primarily extend the knee, the hamstrings are mainly responsible for flexing the knee and extending the hip, while the gluteus maximus is primarily involved in hip extension and external rotation. Therefore, the adductor muscle group is specifically identified as the key player in hip adduction.