Alterations to the orientation of the ground reaction force vector affect sprint acceleration performance in team sports athletes

Bezodis, Neil E. and North, Jamie S. and Razavet, Jane L. (2016) Alterations to the orientation of the ground reaction force vector affect sprint acceleration performance in team sports athletes. Journal of Sports Sciences, 35 (18). ISSN 0264-0414

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Official URL: http://dx.doi.org/10.1080/02640414.2016.1239024

Abstract

A more horizontally oriented ground reaction force vector is related to higher levels of sprint acceleration performance across a range of athletes. However, the effects of acute experimental alterations to the force vector orientation within athletes is unknown. Fifteen male team sports athletes completed maximal effort 10 m accelerations in three conditions following different verbal instructions intended to manipulate the force vector orientation. Ground reaction forces were collected from the step nearest 5 m and stance leg kinematics at touchdown were also analysed to understand specific kinematic features of touchdown technique which may influence the consequent force vector orientation. Magnitude-based inferences were used to compare findings between conditions. There was a likely more horizontally oriented ground reaction force vector and a likely lower peak vertical force in the control condition compared with the experimental conditions. 10 m sprint time was very likely quickest in the control condition which confirmed the importance of force vector orientation for acceleration performance on a within-athlete basis. The stance leg kinematics revealed that a more horizontally oriented force vector during stance was preceded at touchdown by a likely more dorsiflexed ankle, a likely more flexed knee, and a possibly or likely greater hip extension velocity.

Item Type: Journal Article
Additional Information: As accepted for publication. The published Version of Record is available via: http://dx.doi.org/10.1080/02640414.2016.1239024
Subjects: 700 The arts; fine & decorative arts; recreation > 796 Athletic & outdoor sports & games
School/Department: School of Sport, Health and Applied Science
Depositing User: Kevin Sanders
Date Deposited: 23 Sep 2016 08:14
Last Modified: 29 Aug 2017 15:07
URI: http://research.stmarys.ac.uk/id/eprint/1228

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