# Stride-to-Stride Variability of the Center of Mass in Male Trained Runners After an Exhaustive Run: A Three Dimensional Movement Variability Analysis With a Subject-Specific Anthropometric Model

Möhler, Felix; Stetter, Bernd ; Müller, Hermann; Stein, Thorsten

##### Abstract:
The motion of the human body can be described by the motion of its center of mass (CoM). Since the trajectory of the CoM is a crucial variable during running, one can assume that trained runners would try to keep their CoM trajectory constant from stride to stride. However, when exposed to fatigue, runners might have to adapt certain biomechanical parameters. The Uncontrolled Manifold approach (UCM) and the Tolerance, Noise, and Covariation (TNC) approach are used to analyze changes in movement variability while considering the overall task of keeping a certain task relevant variable constant. The purpose of this study was to investigate if and how runners adjust their CoM trajectory during a run to fatigue at a constant speed on a treadmill and how fatigue affects the variability of the CoM trajectory. Additionally, the results obtained with the TNC approach were compared to the results obtained with the UCM analysis in an earlier study on the same dataset. Therefore, two TNC analyses were conducted to assess effects of fatigue on the CoM trajectory from two viewpoints: one analyzing the CoM with respect to a lab coordinate system (PV$_{lab}$) and another one analyzing the CoM with respect to the right foot (PV$_{foot}$). ... mehr

 Zugehörige Institution(en) am KIT Institut für Sport und Sportwissenschaft (IfSS) Publikationstyp Zeitschriftenaufsatz Publikationsmonat/-jahr 05.2021 Sprache Englisch Identifikator ISSN: 2624-9367 KITopen-ID: 1000133302 Erschienen in Frontiers in sports and active living Verlag Frontiers Media Band 3 Seiten Art.-Nr. 665500 Vorab online veröffentlicht am 24.05.2021 Nachgewiesen in Dimensions Relationen in KITopen Ist enthalten inUnraveling the Effects of Expertise and Fatigue on Kinematics and Stride-to-Stride Variability in Running. Möhler, Felix; Stein, Thorsten (2022) Hochschulschrift (1000145572)
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