Journal article 1697 views 628 downloads
Understanding the effect of touchdown distance and ankle joint kinematics on sprint acceleration performance through computer simulation
Neil Bezodis 
,
Grant Trewartha,
Aki Ilkka Tapio Salo
,
Grant Trewartha,
Aki Ilkka Tapio Salo
Sports Biomechanics, Volume: 14, Issue: 2, Pages: 232 - 245
Swansea University Author:
Neil Bezodis
-
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DOI (Published version): 10.1080/14763141.2015.1052748
Abstract
This study determined the effects of simulated technique manipulations on early acceleration performance. A planar seven-segment angle-driven model was developed and quantitatively evaluated based on the agreement of its output to empirical data from an international-level male sprinter (100 m perso...
| Published in: | Sports Biomechanics |
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| ISSN: | 1476-3141 1752-6116 |
| Published: |
2015
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa26341 |
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| Abstract: |
This study determined the effects of simulated technique manipulations on early acceleration performance. A planar seven-segment angle-driven model was developed and quantitatively evaluated based on the agreement of its output to empirical data from an international-level male sprinter (100 m personal best = 10.28 s). The model was then applied to independently assess the effects of manipulating touchdown distance (horizontal distance between the foot and centre of mass) and range of ankle joint dorsiflexion during early stance on horizontal external power production during stance. The model matched the empirical data with a mean difference of 5.2%. When the foot was placed progressively further forward at touchdown, horizontal power production continually reduced. When the foot was placed further back, power production initially increased (a peak increase of 0.7% occurred at 0.02 m further back) but decreased as the foot continued to touchdown further back. When the range of dorsiflexion during early stance was reduced, exponential increases in performance were observed. Increasing negative touchdown distance directs the ground reaction force more horizontally; however, a limit to the associated performance benefit exists. Reducing dorsiflexion, which required achievable increases in the peak ankle plantar flexor moment, appears potentially beneficial for improving early acceleration performance. |
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| College: |
Faculty of Science and Engineering |
| Issue: |
2 |
| Start Page: |
232 |
| End Page: |
245 |