Abductory Twist

I have a question to bring further clarity to my understanding of the abductory twist seen in late midstance at heel-off. Lets say were dealing with a flexible flatfoot: From heel contact to midstance, the right foot is pronating and by the time the right foot reaches midstance where the Com is over the stance leg, the STJ has used up all its range of motion and is maximally pronated as is the MTJ. The tibia is internally rotating.

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Abductory Twist

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