The purpose of this study was to investigate the relationship between lower trunk motion and the support leg hip joint torque by three-dimensional (3D) analysis. Eight male sprinters ran 60-m with maximal effort from a standing position. Kinematic and kinetic data at the maximal speed phase were obtained with a 3D motion analysis system (250Hz) and force platform (1000Hz). As a result, there was a marginally significant negative correlation (r = -0.70, p = 0.051) between a running velocity and the peak backward angular acceleration of the support-side lower trunk during terminal support phase. It seems to be necessary for diminishing the backward angular acceleration to exert a large support hip adductor torque during the terminal support phase. These findings might be useful to improve maximal running velocity.
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