Ement between knee extensor moment arms for the AMB2 (dorsal) muscle is evident together with the two other studies. The AMB1 (ventral) component only has data from our model (primarily a weak knee flexor), as does the IC (pretty weak knee flexor/extensor at flexed/extended angles). We estimate a bigger knee extensor moment arm for the FMTL muscle but that is mainly because of misidentification of