Kinetic Sprint Asymmetries on a non-motorised Treadmill in Rugby Union Athletes

Details

Serval ID
serval:BIB_33395E0D02A5
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Kinetic Sprint Asymmetries on a non-motorised Treadmill in Rugby Union Athletes
Journal
International journal of sports medicine
Author(s)
Brown S.R., Cross M.R., Girard O., Brocherie F., Samozino P., Morin J.B.
ISSN
1439-3964 (Online)
ISSN-L
0172-4622
Publication state
Published
Issued date
11/2017
Peer-reviewed
Oui
Volume
38
Number
13
Pages
1017-1022
Language
english
Abstract
The purpose of this study was to present a potential link between sprint kinetic (vertical [F <sub>V</sub> ] and horizontal force [F <sub>H</sub> ]) asymmetries and athletic performance during acceleration and maximal velocity (v <sub>max</sub> ) 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 <sub>H</sub> during acceleration (4.3 vs. 3.5 N·kg <sup>-1</sup> ) and v <sub>max</sub> (3.7 vs. 2.8 N·kg <sup>-1</sup> ) sprinting (both ES=1.2), but not in F <sub>V</sub> (21.8 vs. 20.8 N·kg <sup>-1</sup> , ES=- 0.6 for acceleration; 23.9 vs. 22.8 N·kg <sup>-1</sup> , ES=- 0.5 for v <sub>max</sub> , respectively). Group mean asymmetry was lower in F <sub>V</sub> compared to F <sub>H</sub> during acceleration (1.6 vs. 6.8%) and v <sub>max</sub> (1.6 vs. 8.2%). The range of asymmetry was much lower in F <sub>V</sub> (0.03-4.3%) compared to F <sub>H</sub> (0.2-28%). In un-injured rugby athletes, the magnitude and range of asymmetry scores in F <sub>H</sub> , occurring during acceleration and v <sub>max</sub> phases, where much greater than those found in F <sub>V</sub> . These findings highlight the potential for some un-injured athletes to possess kinetic asymmetries known as crucial components for acceleration performance in sprinting.
Keywords
Acceleration, Athletic Performance/physiology, Cross-Sectional Studies, Exercise Test/methods, Football/physiology, Humans, Kinetics, Leg/physiology, Running/physiology
Pubmed
Web of science
Create date
22/03/2018 20:41
Last modification date
20/08/2019 13:19
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