Abstract

The knowledge of loads acting on Running Specific Prostheses (RSP), and in particular, on Running Prosthetic Feet (RPF) is crucial for evaluating the athlete’s running technique, designing RPF, and developing models of the runners. The aim of this work was to develop a set of instrumented RPF (iRPF) suitable for track data collection of start, sprinting, and whole run-in and take-off of long jump. The system allows measuring with a portable data logger forces acting on the foot clamp on multiple steps of the athlete without modifying the RSP behavior: The method involves strain gauge bridges applied to each RPF in a configuration that allows decoupling the loads parallel and normal to the foot clamp during the stance phase. Comparison with literature data and validation against force platform data gave confirmation of the validity of the method in the estimation of determinants of sprint performance.

Highlights

  • Running Specific Prostheses (RSP) are assistive technologies used by Paralympic sprint runners and long jumpers to reach their maximal performance

  • Ground Reaction Forces (GRF) measured with the force platform and those obtained with the instrumented RPF (iRPF) during a running test of athlete KD2 on a force platform (Figure 5)

  • Force components collected in the Foot reference system from the iRPF (Figure 5a) are combined with the absolute orientation angle of the Foot reference system obtained by the Xsens Moven suit during the step over the force platform (Figure 5b)

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Summary

Introduction

Running Specific Prostheses (RSP) are assistive technologies used by Paralympic sprint runners and long jumpers to reach their maximal performance. RPF can typically be J-shaped or C-shaped: Loads acting on the RPF come from Ground Reaction Forces (GRF) and reach the leg through a complex combination of loads parallel and normal to the prosthetic pylon/socket assembly. Since their introduction, researchers have focused on the properties of Running Prosthetic Feet (RPF). Studies which focused on the sprint efficiency of running, measured the GRF along the run [5] on a set of force platforms embedded in the floor [1,6] Most of these studies were completed indoor, on elite athletes performing their sprint or jump on force

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