During gait, which muscle acts as the primary hip flexor?

During gait, which muscle acts as the primary hip flexor?

• A. Gluteus maximus
• B. Iliopsoas
• C. Tibialis posterior
• D. Soleus

Answer: (B)

The muscle that serves as the main hip flexor during walking is the iliopsoas. This muscle, made up of the psoas major and iliacus, crosses the hip joint and attaches to the femur, giving it a direct and strong pull to flex the hip. It is particularly active during the swing phase when the leg is being advanced forward, making it the primary driver of hip flexion in gait. The gluteus maximus, in contrast, extends the hip and helps propulsion from stance, not flexion. The tibialis posterior and the soleus act on the foot and ankle, not the hip, so they don’t contribute to hip flexion.

The muscle that serves as the main hip flexor during walking is the iliopsoas. This muscle, made up of the psoas major and iliacus, crosses the hip joint and attaches to the femur, giving it a direct and strong pull to flex the hip. It is particularly active during the swing phase when the leg is being advanced forward, making it the primary driver of hip flexion in gait. The gluteus maximus, in contrast, extends the hip and helps propulsion from stance, not flexion. The tibialis posterior and the soleus act on the foot and ankle, not the hip, so they don’t contribute to hip flexion.