Question

1. What effect does increase hip joint flexion have on the moment arm of the following hip extensor muscles: adductor magnus, semitendinosus, gluteus maximus? What does this mean for the hip extension torque generating capacity of these muscles? Use a figure to help explain your answer.

Answer 1

During hip joint flexion , flexor muscles are playing their role with extensor muscles.

Gluteus maximus is a main hip extensor but its also plays its role during flexion by stretching.

Adductor magnus also plays its role during flexion. It is a major stabilzer which plays its role to prevent from excessive internal rotation while running or excercise.

Semitendinosus or other muscle maintaining their angle with the body during flexion process.

On hip torqe generating capacity hip extensor muscles making angle with the body to form the internal rotation of the hip.