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Comparison of two- and three-dimensional methods for analysis of trunk kinematic variables in the golf swing

Smith, Aimee C, Roberts, Jonathan R, Wallace, Eric S and Kong, Pui W (2016) Comparison of two- and three-dimensional methods for analysis of trunk kinematic variables in the golf swing. Journal of Applied Biomechanics, 32 (1). [Journal article]

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URL: https://dspace.lboro.ac.uk/2134/21663

DOI: 10.1123/jab.2015-0032

Abstract

Two-dimensional methods have been used to compute trunk kinematic variables (flexion/extension, lateral bend, axial rotation) and X-factor (difference in axial rotation between trunk and pelvis) during the golf swing. Recent X-factor studies advocated three-dimensional (3D) analysis due to the errors associated with two-dimensional (2D) methods, but this has not been investigated for all trunk kinematic variables. The purpose of this study was to compare trunk kinematic variables and X-factor calculated by 2D and 3D methods to examine how different approaches influenced their profiles during the swing. Trunk kinematic variables and X-factor were calculated for golfers from vectors projected onto the global laboratory planes and from 3D segment angles. Trunk kinematic variable profiles were similar in shape; however, there were statistically significant differences in trunk flexion (-6.5 ± 3.6°) at top of backswing and trunk right-side lateral bend (8.7 ± 2.9°) at impact. Differences between 2D and 3D X-factor (approximately 16°) could largely be explained by projection errors introduced to the 2D analysis through flexion and lateral bend of the trunk and pelvis segments. The results support the need to use a 3D method for kinematic data calculation to accurately analyze the golf swing.

Item Type:Journal article
Keywords:golf, three-dimensional, two-dimensional, X-factor, trunk kinematic variables
Faculties and Schools:Faculty of Life and Health Sciences > School of Sport
Faculty of Life and Health Sciences
Research Institutes and Groups:Sport and Exercise Sciences Research Institute
Sport and Exercise Sciences Research Institute > Centre for Sports Science and Sports Medicine
ID Code:39250
Deposited By: Mrs Julie Haydock
Deposited On:09 Jan 2018 10:06
Last Modified:09 Jan 2018 10:06

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