Abstract
Although accelerometers’ responses during running are not perfectly understood, they are widely used to study performance and the risk of injury. To outline the typical tibial acceleration pattern during running, this study aims to investigate the repeatability of acceleration signals with respect to the ground reaction force waveforms. Ten amateur runners were asked to perform ten trials along a straight line. One participant was asked to perform this protocol over ten sessions. Tibial accelerations and ground reaction forces were measured during the stance phase. The coefficient of multiple correlation R was computed to study the intra- and inter-test and subject repeatability of accelerometric and force waveforms. A good (R>0.8) intra- and inter-test repeatability was observed for all measured signals. Similar results were observed for intra-subject repeatability. A good inter-subject repeatability was observed only for the longitudinal acceleration and vertical and antero-posterior forces. Typical accelerometric signatures were outlined for each case studied.
Highlights
Running has been a growing activity for the last decade, and nowadays it accumulates more and more interest
This study focused on a comparison between accelerations and ground reaction forces (GRFs) for an amateur runner population
Signal waveforms of the study TEST, for the intra- and inter-test repeatability are presented in for the inter-test study, high similarities appeared between the sessions, for the longitudinal acceleration and the vertical force
Summary
Running has been a growing activity for the last decade, and nowadays it accumulates more and more interest. Numerous studies have focused on a detailed description of the running mechanism in order to understand performance [1], or the appearance of injuries [2]. The biomechanical description of running has been mainly performed with experimental tools such as opto-electronic cameras or force platforms to capture kinematic and dynamic information [3]. GRF signals have shown consistent waveforms and are commonly used to describe running [5]. These systems are highly valuable to precisely capture running in a laboratory, they are highly restricted to investigate successive running cycles in a running field
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