The Parallel Squat: A Comparison Between Kinematic, Kinetic, and Muscle Activity Components of Measurement
Loading...
Authors
McAllister, Megan
Date
Type
thesis
Language
eng
Keyword
Biomechanics , Movement quality , Movement symmetry , Kinematics , Kinetics
Alternative Title
Abstract
Movement quality screening tools have been developed to reduce the risk of injury and enhance physical performance. These screening tools use observational techniques to analyze movement and identify faulty movement patterns. One variable that is used in some screening tools and that is a valid predictor of injury is movement asymmetry. The issue is that screening tools are currently assessing asymmetry from a kinematic perspective by observing the individual during their movement execution, while discounting potential asymmetric behaviour at the kinetic or muscle activity components of movement. The purpose of this study was to evaluate movement asymmetry from a kinematic, kinetic, and muscle activity component to identify whether differences exist between the components of movement.
Kinematic, kinetic, and muscle activity data were collected from thirty-four healthy young adults as they performed twenty-five parallel squats in five conditions: normal, slow metronome, normal metronome, fast metronome, and weighted squat. The kinematic component was represented by joint angles, while the kinetic component was represented by joint moments and the muscle activity component was represented by electromyography amplitude. Cross-correlations and normalized RMS values were calculated between the left and right ankle, knee, and hip at each component of measurement. Multiple two-way repeated measures ANOVAs assessed the difference between the conditions and the components of measurement.
Results demonstrated a significant difference in cross-correlations and normalized RMS values between the kinematic, kinetic, and muscle activity components at the ankle, knee, and hip. Generally, there was no significant difference between the conditions in terms of asymmetry measures. These results present an important consideration for movement quality screening tools: are we getting the full picture when evaluating movement using observational techniques and focusing on kinematic measures?
Description
Citation
Publisher
License
CC0 1.0 Universal
Queen's University's Thesis/Dissertation Non-Exclusive License for Deposit to QSpace and Library and Archives Canada
ProQuest PhD and Master's Theses International Dissemination Agreement
Intellectual Property Guidelines at Queen's University
Copying and Preserving Your Thesis
This publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.
Queen's University's Thesis/Dissertation Non-Exclusive License for Deposit to QSpace and Library and Archives Canada
ProQuest PhD and Master's Theses International Dissemination Agreement
Intellectual Property Guidelines at Queen's University
Copying and Preserving Your Thesis
This publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.