Dorsiflexion

I just received a short
clip of two strides from Bolts WR from Frans Bosch. It is in super slow motion,
clearly no exaggerated dorsiflexion at the ankle in recovery and at foot strike.
The proof is in the pudding as they say. (Do not have permission to post the
video – do not know the source) Work on what matters, the "whip from the hip" as Frans Bosch calls it.