The X-Factor: An evaluation of common methods used to analyse major inter-segment kinematics during the golf swing

A common biomechanical feature of a golf swing, described in various ways in the literature, is the interaction between the thorax and pelvis, often termed the X-Factor. There is no consistent method used within golf biomechanics literature however to calculate these segment interactions. The purpos...

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Vydané v:Journal of sports sciences Ročník 31; číslo 11; s. 1156 - 1163
Hlavní autori: Brown, Susan J., Selbie, W. Scott, Wallace, Eric S.
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: England Routledge 01.07.2013
Taylor & Francis Ltd
Predmet:
Adolescent
Adult
Analysis
Athletic Performance
Biomechanical Phenomena
Biomechanics
Female
Golf
Humans
Kinematics
Male
methods
Motor Skills
Movement
Pelvis
Regression analysis
Task Performance and Analysis
Thorax
X-Factor
Young Adult
ISSN:0264-0414, 1466-447X, 1466-447X
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Shrnutí:A common biomechanical feature of a golf swing, described in various ways in the literature, is the interaction between the thorax and pelvis, often termed the X-Factor. There is no consistent method used within golf biomechanics literature however to calculate these segment interactions. The purpose of this study was to examine X-factor data calculated using three reported methods in order to determine the similarity or otherwise of the data calculated using each method. A twelve-camera three-dimensional motion capture system was used to capture the driver swings of 19 participants and a subject specific three-dimensional biomechanical model was created with the position and orientation of each model estimated using a global optimisation algorithm. Comparison of the X-Factor methods showed significant differences for events during the swing (P < 0.05). Data for each kinematic measure were derived as a times series for all three methods and regression analysis of these data showed that whilst one method could be successfully mapped to another, the mappings between methods are subject dependent (P <0.05). Findings suggest that a consistent methodology considering the X-Factor from a joint angle approach is most insightful in describing a golf swing.
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ISSN:0264-0414
1466-447X
1466-447X
DOI:10.1080/02640414.2013.775474