Question

What movements does the GRF produce at the ankle, knee, and hip at initial contact?

a. Plantarflexion, flexion, flexion
b. Dorsiflexion, extension, extension
c. Dorsiflexion, flexion, flexion
d. Plantarflexion, extension, extension

Answer 1

At initial contact, the GRF produces dorsiflexion at the ankle, flexion at the knee, and flexion at the hip.

Step-by-step explanation:

At initial contact, the Ground Reaction Force (GRF) produces different movements at the ankle, knee, and hip. At the ankle, the GRF produces dorsiflexion, which is the movement of lifting the front of the foot towards the anterior leg. At the knee, the GRF produces flexion, which is the bending of the knee. And at the hip, the GRF also produces flexion, which is the bending of the hip joint.