At heel strike subtalar joint pronation produces shock absorbtion. Over the years I have seen this statement written time after time as if it’s a self evident but so far I haven’t seen an explanation, ie what about subtalar joint pronation absorbs ground reaction force at heel strike? My own rationalisation is that the vertical reduction in the apparent height of the calcaneum associated with pronation gives that extra vertical height for the body to be decelerated
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Heel strike subtalar joint pronation shock absorbtion