Comparison of rearfoot motion assessments from 3D motion capture and the Achillex® system

Extensive rearfoot movement and high impact forces have been linked to overuse injuries in running. However, several prospective studies indicated that the occurrence of injuries is not directly related to the amount of rearfoot movement during ground contact or the impact magnitude at touch-down (Nigg 2001). However, it may be that individuals adapt differently to alterations of running footwear. If that is the case the factor ageing of the shoe becomes important to consider. Recently, a fast and easy to use mobile system was presented to allow for such assessments with providing an automated data analysis and the possibility of comparing between repeated measurements by providing fast feedback.