During terminal stance and pre-swing, the internal ankle muscle action is what?

During terminal stance and pre-swing, the internal ankle muscle action is what?

• A. Eccentric dorsiflexors
• B. Isometric hip extensors
• C. Concentric plantarflexors
• D. Eccentric hip abductors

Answer: (C)

During terminal stance and pre-swing, the ankle action is provided by the plantarflexor muscles contracting concentrically. The gastrocnemius and soleus shorten to plantarflex the ankle, generating the push-off that propels the body forward and helps the heel rise as the opposite foot moves ahead. This forward propulsion is the main contribution at the ankle in this phase. Dorsiflexors would be doing the opposite—controlling or acting earlier in the cycle—not driving the push-off. Hip muscles may influence limb progression in other ways, but the key ankle action here is concentric plantarflexion.

During terminal stance and pre-swing, the ankle action is provided by the plantarflexor muscles contracting concentrically. The gastrocnemius and soleus shorten to plantarflex the ankle, generating the push-off that propels the body forward and helps the heel rise as the opposite foot moves ahead. This forward propulsion is the main contribution at the ankle in this phase. Dorsiflexors would be doing the opposite—controlling or acting earlier in the cycle—not driving the push-off. Hip muscles may influence limb progression in other ways, but the key ankle action here is concentric plantarflexion.