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A joint kinetic analysis of rugby place kicking technique to understand why kickers achieve different performance outcomes

Alexandra C. Atack, Grant Trewartha, Neil Bezodis Orcid Logo

Journal of Biomechanics, Volume: 87, Pages: 114 - 119

Swansea University Author: Neil Bezodis Orcid Logo

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DOI (Published version): 10.1016/j.jbiomech.2019.02.020

Abstract

We aimed to identify differences in kicking leg and torso mechanics between groups of rugby place kickers who achieve different performance outcomes, and to understand why these features are associated with varying levels of success. Thirty-three experienced place kickers performed maximum effort pl...

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Published in: Journal of Biomechanics
ISSN: 0021-9290
Published: 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa49000
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spelling 2020-08-06T16:45:30.7818833 v2 49000 2019-02-27 A joint kinetic analysis of rugby place kicking technique to understand why kickers achieve different performance outcomes 534588568c1936e94e1ed8527b8c991b 0000-0003-2229-3310 Neil Bezodis Neil Bezodis true false 2019-02-27 STSC We aimed to identify differences in kicking leg and torso mechanics between groups of rugby place kickers who achieve different performance outcomes, and to understand why these features are associated with varying levels of success. Thirty-three experienced place kickers performed maximum effort place kicks, whilst three-dimensional kinematic (240 Hz) and ground reaction force (960 Hz) data were recorded. Kicking leg and torso mechanics were compared between the more successful (‘long’) kickers and two sub groups of less successful kickers (’short’ and ‘wide-left’) using magnitude-based inferences and statistical parametric mapping. Short kickers achieved substantially slower ball velocities compared with the long kickers (20.8 ± 2.2 m/s vs. 27.6 ± 1.7 m/s, respectively) due to performing substantially less positive hip flexor (normalised mean values = 0.071 vs. 0.092) and knee extensor (0.004 vs. 0.009) joint work throughout the downswing, which may be associated with their more front-on body orientation, and potentially a lack of strength or intent. Wide-left kickers achieved comparable ball velocities (26.9 ± 1.6 m/s) to the long kickers, but they were less accurate due to substantially more longitudinal ball spin and a misdirected linear ball velocity. Wide-left kickers created a tension arc across the torso and therefore greater positive hip flexor joint work (normalised mean = 0.112) throughout the downswing than the long kickers. Whilst this may have assisted kicking foot velocity, it also induced greater longitudinal torso rotation during the downswing, and may have affected the ability of the hip to control the direction of the foot trajectory. Journal Article Journal of Biomechanics 87 114 119 0021-9290 Football, Inverse dynamics, Kick, Mechanics, Three-dimensional 18 4 2019 2019-04-18 10.1016/j.jbiomech.2019.02.020 COLLEGE NANME Sport and Exercise Sciences COLLEGE CODE STSC Swansea University 2020-08-06T16:45:30.7818833 2019-02-27T09:29:57.5027106 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Sport and Exercise Sciences Alexandra C. Atack 1 Grant Trewartha 2 Neil Bezodis 0000-0003-2229-3310 3 49000__13192__0bbbe2ce885c4d83b817d9c81019d903.pdf atack2019.pdf 2019-03-19T13:38:49.1970000 Output 559704 application/pdf Accepted Manuscript true 2020-02-28T00:00:00.0000000 Released under the terms of a Creative Commons Attribution Non-Commercial No Derivatives License (CC-BY-NC-ND). true eng
title A joint kinetic analysis of rugby place kicking technique to understand why kickers achieve different performance outcomes
spellingShingle A joint kinetic analysis of rugby place kicking technique to understand why kickers achieve different performance outcomes
Neil Bezodis
title_short A joint kinetic analysis of rugby place kicking technique to understand why kickers achieve different performance outcomes
title_full A joint kinetic analysis of rugby place kicking technique to understand why kickers achieve different performance outcomes
title_fullStr A joint kinetic analysis of rugby place kicking technique to understand why kickers achieve different performance outcomes
title_full_unstemmed A joint kinetic analysis of rugby place kicking technique to understand why kickers achieve different performance outcomes
title_sort A joint kinetic analysis of rugby place kicking technique to understand why kickers achieve different performance outcomes
author_id_str_mv 534588568c1936e94e1ed8527b8c991b
author_id_fullname_str_mv 534588568c1936e94e1ed8527b8c991b_***_Neil Bezodis
author Neil Bezodis
author2 Alexandra C. Atack
Grant Trewartha
Neil Bezodis
format Journal article
container_title Journal of Biomechanics
container_volume 87
container_start_page 114
publishDate 2019
institution Swansea University
issn 0021-9290
doi_str_mv 10.1016/j.jbiomech.2019.02.020
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
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description We aimed to identify differences in kicking leg and torso mechanics between groups of rugby place kickers who achieve different performance outcomes, and to understand why these features are associated with varying levels of success. Thirty-three experienced place kickers performed maximum effort place kicks, whilst three-dimensional kinematic (240 Hz) and ground reaction force (960 Hz) data were recorded. Kicking leg and torso mechanics were compared between the more successful (‘long’) kickers and two sub groups of less successful kickers (’short’ and ‘wide-left’) using magnitude-based inferences and statistical parametric mapping. Short kickers achieved substantially slower ball velocities compared with the long kickers (20.8 ± 2.2 m/s vs. 27.6 ± 1.7 m/s, respectively) due to performing substantially less positive hip flexor (normalised mean values = 0.071 vs. 0.092) and knee extensor (0.004 vs. 0.009) joint work throughout the downswing, which may be associated with their more front-on body orientation, and potentially a lack of strength or intent. Wide-left kickers achieved comparable ball velocities (26.9 ± 1.6 m/s) to the long kickers, but they were less accurate due to substantially more longitudinal ball spin and a misdirected linear ball velocity. Wide-left kickers created a tension arc across the torso and therefore greater positive hip flexor joint work (normalised mean = 0.112) throughout the downswing than the long kickers. Whilst this may have assisted kicking foot velocity, it also induced greater longitudinal torso rotation during the downswing, and may have affected the ability of the hip to control the direction of the foot trajectory.
published_date 2019-04-18T03:59:44Z
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score 11.037581

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