Heel Thrust Test for Posterior Ankle Impingement Posterior ankle impingement is assumed to be a consequence of plantarflexion dominant ankle inversion trauma. Pain on the posterior aspect of the ankle persists while the anterolateral pain typically felt after an ankle sprain subsides. Laslett first described the heel thrust test for the condition in 1988. As of now it has not been subject to reliability or validity studies so the clinical value is unknown. | Physiotutors