In order to produce better shoes that cushion athletes from the high impact forces of running and still provide stability to the foot it is essential to have a method of quickly and reliably evaluating the performance of prototype shoes. The analysis of rear-foot motion requires the use of film or video recordings of test subjects running on a treadmill. Specific points on the subject are tracked to give a measure of inversion or eversion of the heel. This paper describes the testing procedure and its application to running shoe design. A comparison of film and video systems is also discussed.
Les Cooper, Les Cooper,
"Analysis Of Rearfoot Motion In Running Shoes", Proc. SPIE 0693, High Speed Photography, Videography, and Photonics IV, (8 December 1986); doi: 10.1117/12.936752; https://doi.org/10.1117/12.936752