In the Data Analysis section, it was stated that, “The joint moments used in the optimization were the flexion–extension and abduction-adduction moments at the hip and ankle, and the flexion–extension moment at the knee.” However, it has come to our attention that this is incorrect, and instead the joint moments used in the static optimization routine were the flexion–extension and abduction-adduction moments at the hip, and the flexion–extension moment at the knee and ankle.

Please accept our apologies for the error.

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