1LIBM - Laboratoire Interuniversitaire de Biologie de la Motricité (CAMPUS SANTE INNOVATIONS - Bâtiment IRMIS - 10 rue de la Marandière 42270 Saint Priest en Jarez /
Université Savoie Mont Blanc - Campus Scientifique - 73370 Le Bourget du Lac / UFR STAPS - Université Claude Bernard Lyon I - 27/29 Boulevard du 11 novembre 1918 - 69622 Villeurbanne Cedex - France)
Abstract : The purpose of this study was to present a potential link between sprint kinetic (vertical [F V] and horizontal force [F H]) asymmetries and athletic performance during acceleration and maximal velocity (v max) sprinting. Thirty un-injured male rugby athletes performed 8-s sprints on a non-motorised treadmill. Kinetic data were divided into 'strong' and 'weak' legs based on individually averaged peak values observed during sprinting and were analysed to evaluate asymmetry. Large differences were found between the strong and weak legs in F H during acceleration (4.3 vs. 3.5 N·kg-1) and v max (3.7 vs. 2.8 N·kg-1) sprinting (both ES=1.2), but not in F V (21.8 vs. 20.8 N·kg-1, ES=- 0.6 for acceleration; 23.9 vs. 22.8 N·kg-1, ES=- 0.5 for v max, respectively). Group mean asymmetry was lower in F V compared to F H during acceleration (1.6 vs. 6.8%) and v max (1.6 vs. 8.2%). The range of asymmetry was much lower in F V (0.03-4.3%) compared to F H (0.2-28%). In un-injured rugby athletes, the magnitude and range of asymmetry scores in F H, occurring during acceleration and v max phases, where much greater than those found in F V. These findings highlight the potential for some un-injured athletes to possess kinetic asymmetries known as crucial components for acceleration performance in sprinting.
https://hal.univ-cotedazur.fr/hal-01858806
Contributor : Jean-Benoit Morin
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Submitted on : Tuesday, August 21, 2018 - 1:36:39 PM
Last modification on : Wednesday, November 20, 2019 - 3:15:25 AM
Matt Cross, Johan Lahti, Scott Brown, Mehdi Chedati, Pedro Jimenez-Reyes, et al.. Kinetic Sprint Asymmetries on a non-motorised Treadmill in Rugby Union Athletes. International Journal of Sports Medicine, Thieme Publishing, 2017, 38 (13), pp.1017 - 1022. ⟨10.1055/s-0043-117607⟩. ⟨hal-01858806⟩
