A simple method for computing sprint acceleration kinetics from running velocity data: Replication study with improved design

Journal of Biomechanics
Jean-Benoît MorinRyu Nagahara

Abstract

Measuring the ground reaction forces (GRF) underlying sprint acceleration is important to understanding the performance of such a common task. Until recently direct measurements of GRF during sprinting were limited to a few steps per trial, but a simple method (SM) was developed to estimate GRF across an entire acceleration. The SM utilizes displacement- or velocity-time data and basic computations applied to the runner's center of mass and was validated against compiled force plate (FP) measurements; however, this validation used multiple-trials to generate a single acceleration profile, and consequently fatigue and error may have introduced noise into the analyses. In this study, we replicated the original validation by comparing the main sprint kinetics and force-velocity-power variables (e.g. GRF and its horizontal and vertical components, mechanical power output, ratio of horizontal component to resultant GRF) between synchronized FP data from a single sprinting acceleration and SM data derived from running velocity measured with a 100 Hz laser. These analyses were made possible thanks to a newly developed 50-m FP system providing seamless GRF data during a single sprint acceleration. Sixteen trained male sprinters perform...Continue Reading

Citations

Feb 9, 2021·Frontiers in Sports and Active Living·Caroline PrincePierre Samozino
May 24, 2021·Journal of Biomechanics·Jean-Benoit MorinPietro E di Prampero
Jul 9, 2021·Frontiers in Sports and Active Living·Thomas SeidlMartin Lames
Aug 8, 2021·International Journal of Environmental Research and Public Health·Pascal EdouardJean-Benoît Morin
Aug 28, 2021·Journal of Biomechanics·Neil BezodisPierre Samozino
Nov 4, 2021·Journal of Sports Sciences·Jace A DelaneyGrant M Duthie
Nov 9, 2021·Sports Biomechanics·D Alonso-FernandezY Taboada-Iglesias
Nov 15, 2021·Scandinavian Journal of Medicine & Science in Sports·Pierre SamozinoJean-Benoit Morin

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