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Repeated side-cutting knee and hip biomechanics for a macro-cycle of a professional rugby league season
Stirling, Ben
Stirling, Ben
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2016-09
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Abstract
The aim of this study was to determine the variability of lower-limb side-cutting
biomechanics in professional rugby league players during a season. Thirteen
male professional players were included with a mean age of 22 ±3.4 years.
The study used a one-way repeated measures experimental design. Subjects
were tested at three time points, separated by four weeks, over the last three
months of a season. Peak knee valgus and internal rotation moments (Nm/kg-
1), and flexion angle (°), and hip abduction moment (Nm/kg-1) during the
weight-acceptance of the stance phase were collected for all side-cutting
maneuvers. A one way repeated-measures ANOVA was performed on the
data with Bonferroni post-hoc analysis identifying differences between testing
sessions. Mean hip and knee kinematics and kinetics were similar for all
measures. There was a significant difference in peak knee flexion angle (°)
(Left = F(1, 17) =4.895, Right = F(2, 24) =6.603) and knee valgus moment
(Nm/kg-1) (Left =F(2, 24) =9.535, Right =F(2, 24) =6.060) showing significant
variability between testing sessions one and three for right knee flexion and
knee valgus in both limbs. Bi-lateral knee valgus moments were also
significantly different between sessions two and three. Professional rugby
league players have shown to be more efficient during the weight-acceptance
phase of a side-cutting manoeuver compared to recreational athletes which
may be beneficial to reducing frontal plane knee loading and injury risk at the
knee. In addition, this study has reinforced the link between the hip and the
knee in providing proximal stability for distal mobility.
Citation
Stirling, B. (2016). Repeated side-cutting knee and hip biomechanics for a macro-cycle of a professional rugby league season (Master's thesis). University of Chester, United Kingdom.
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University of Chester
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Thesis or dissertation
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en