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

ROWLEY, Lee James, CHURCHILL, Sarah M, DUNN, Marcus and WHEAT, Jon (2021). Effect of hurdling step strategy on the kinematics of the block start. Sports Biomechanics.

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Abstract

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:	Article
Additional Information:	This article was retrospectively made gold open access (June 2021).
Uncontrolled Keywords:	Biomechanics; acceleration; athletics; sprint; track and field; 0913 Mechanical Engineering; 1106 Human Movement and Sports Sciences; 1303 Specialist Studies in Education; Sport Sciences
Identification Number:	https://doi.org/10.1080/14763141.2021.1896028
SWORD Depositor:	Symplectic Elements
Depositing User:	Symplectic Elements
Date Deposited:	16 Apr 2021 08:55
Last Modified:	20 Oct 2021 13:29
URI:	https://shura.shu.ac.uk/id/eprint/28521

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