Name of test

Active ankle inversion

What it tests

Function of tibialis posterior

How to do it

For the RIGHT FOOT: Steady the heel with your left hand and grasp the forefoot with your right hand (red lines); ask the patient to actively invert against resistance (black arrow)

The normal response

Painless and strong motion

What it means if not normal

Assuming that passive ankle inversion is normal, abnormal active inversion most likely suggests tendinopathy of the tibialis posterior, especially near its insertion on the navicular. L5 or tibial nerve disorders may cause weakness here


The single heel rise is the better test to assess the function of the tibialis posterior tendon and muscle


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active inversion.JPG (image/jpeg)