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Understanding the effect of touchdown distance and ankle joint kinematics on sprint acceleration performance through computer simulation

Neil Bezodis Orcid Logo, Grant Trewartha, Aki Ilkka Tapio Salo

Sports Biomechanics, Volume: 14, Issue: 2, Pages: 232 - 245

Swansea University Author: Neil Bezodis Orcid Logo

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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...

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Published in: Sports Biomechanics
ISSN: 1476-3141 1752-6116
Published: 2015
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URI: https://cronfa.swan.ac.uk/Record/cronfa26341
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spelling 2020-07-06T15:55:59.8768790 v2 26341 2016-02-16 Understanding the effect of touchdown distance and ankle joint kinematics on sprint acceleration performance through computer simulation 534588568c1936e94e1ed8527b8c991b 0000-0003-2229-3310 Neil Bezodis Neil Bezodis true false 2016-02-16 STSC 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. Journal Article Sports Biomechanics 14 2 232 245 1476-3141 1752-6116 31 12 2015 2015-12-31 10.1080/14763141.2015.1052748 COLLEGE NANME Sport and Exercise Sciences COLLEGE CODE STSC Swansea University 2020-07-06T15:55:59.8768790 2016-02-16T15:05:46.3850941 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Sport and Exercise Sciences Neil Bezodis 0000-0003-2229-3310 1 Grant Trewartha 2 Aki Ilkka Tapio Salo 3 0026341-16022016155725.pdf Bezodis_et_al_2015_SB.pdf 2016-02-16T15:57:25.7670000 Output 689998 application/pdf Accepted Manuscript true 2016-12-23T00:00:00.0000000 true
title Understanding the effect of touchdown distance and ankle joint kinematics on sprint acceleration performance through computer simulation
spellingShingle Understanding the effect of touchdown distance and ankle joint kinematics on sprint acceleration performance through computer simulation
Neil Bezodis
title_short Understanding the effect of touchdown distance and ankle joint kinematics on sprint acceleration performance through computer simulation
title_full Understanding the effect of touchdown distance and ankle joint kinematics on sprint acceleration performance through computer simulation
title_fullStr Understanding the effect of touchdown distance and ankle joint kinematics on sprint acceleration performance through computer simulation
title_full_unstemmed Understanding the effect of touchdown distance and ankle joint kinematics on sprint acceleration performance through computer simulation
title_sort Understanding the effect of touchdown distance and ankle joint kinematics on sprint acceleration performance through computer simulation
author_id_str_mv 534588568c1936e94e1ed8527b8c991b
author_id_fullname_str_mv 534588568c1936e94e1ed8527b8c991b_***_Neil Bezodis
author Neil Bezodis
author2 Neil Bezodis
Grant Trewartha
Aki Ilkka Tapio Salo
format Journal article
container_title Sports Biomechanics
container_volume 14
container_issue 2
container_start_page 232
publishDate 2015
institution Swansea University
issn 1476-3141
1752-6116
doi_str_mv 10.1080/14763141.2015.1052748
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Sport and Exercise Sciences{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Sport and Exercise Sciences
document_store_str 1
active_str 0
description 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.
published_date 2015-12-31T03:31:35Z
_version_ 1763751278935015424
score 11.013731

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