Effect of hurdling step strategy on the kinematics of the block start

Rowley, L.J., Churchill, S.M., Dunn, M. and Wheat, J. ORCID: 0000-0002-1107-6452, 2021. Effect of hurdling step strategy on the kinematics of the block start. Sports Biomechanics. ISSN 1476-3141

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Athletes use either a seven-step or eight-step strategy to reach the first hurdle in the 110 m hurdle event. This study investigated the effect of step strategy on the start position, the block exit and the first four approach steps. Two-dimensional video data were collected in the sagittal plane from 12 male sprinters, grouped as seven-step (n = 6) or eight-step (n = 6) strategists. Mean block spacing was 0.08 m further apart, block contact time 0.06s longer, first step 0.25 m longer and first ground contact 0.03s longer for seven-step athletes compared with eight-step athletes. There was also a greater vertical displacement of the centre of mass (CoM) (0.04 m) for the seven-step athletes compared with the eight-step athletes. Additionally, the front hip mean angular acceleration was 197°/s2 slower for the seven-step athletes than the eight-step athletes. There was limited difference between groups for mean horizontal velocity at the moment of block exit (0.14 m/s). These technical alterations provide an important first insight into start kinematics. The findings of this study identify the position in the starting blocks, and the key parameters which pertain to the initial phases for a successful seven-step approach strategy to be employed.

Item Type: Journal article
Publication Title: Sports Biomechanics
Creators: Rowley, L.J., Churchill, S.M., Dunn, M. and Wheat, J.
Publisher: Routledge
Date: 6 April 2021
ISSN: 1476-3141
Rights: This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial re-use, distribution, and reproduction in any med-ium, provided the original work is properly cited, and is not altered, transformed, or built upon in any way.
Divisions: Schools > School of Science and Technology
Record created by: Jonathan Gallacher
Date Added: 24 Apr 2024 15:26
Last Modified: 24 Apr 2024 15:26
URI: https://irep.ntu.ac.uk/id/eprint/51327

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