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The effect of trunk orientation upon knee joint loading during unanticipated sidestep cutting manoeuvres
Smith, Matthew W.
Smith, Matthew W.
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2013-09
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dissertation
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Abstract
The purpose of this investigation was to examine the relationship between sagittal and frontal plane trunk orientation and the most commonly accused attributors to anterior cruciate ligament injury. Twenty-one male (mean age 31 years; height 1.8 metres; weight 75 kilograms) with at least 10 years soccer experience, participated in this repeated measures study of experimental design. Forty-four reflective markers were attached to specific landmarks to identify the lower limb and trunk segments. Three-Dimensional and force plate data were recorded for 5 successful trials. Participants were instructed to achieve an approach speed of 3m/s, facilitated by timing gates, complete a right-foot contact on the force plate and execute a sidestep cutting manoeuvre, responding to the movements of the defender. The independent variable tested was trunk orientation (sagittal and frontal plane). Peak values of 7 selected dependent variables were subjected to a two-tailed Spearman’s rho correlation co-efficient test. A bonferroni-corrected p value of 0.007 was used to denote statistical significance. No significant correlations were found to exist. Certain patterns emerged from the results. Subjects who exhibited knee valgus moments also exhibited a posteriorly directed anterior-posterior ground reaction force, whereas some subjects exhibited an anteriorly directed anterior-posterior ground reaction force and exhibited knee varus loading. The results of this study suggest natural trunk movements during sidestep cutting manoeuvres has no relationship with the selected dependent variables in the confines of this experiment.
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University of Chester
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Thesis or dissertation
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en