Using a Single inertial measurement unit to measure the knee flexion angle at touchdown in side cutting movements

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dc.contributor.advisorStefanyshyn, Darren
dc.contributor.authorMalagalage Don, Ishan Chathuranga
dc.contributor.committeememberEdwards, Brent
dc.contributor.committeememberFerber, Reed
dc.contributor.committeememberYanushkevich, Svetlana
dc.date2022-11
dc.date.accessioned2022-09-27T16:02:26Z
dc.date.available2022-09-27T16:02:26Z
dc.date.issued2022-09
dc.description.abstractJoint angles can be an important measure in investigating sport-related injuries as well as in rehabilitation studies. Even though previous researchers have investigated using inertial measurement units to calculate joint angles, only a few studies can be found that were conducted using a single inertial measurement unit (IMU) to measure the joint angles. Furthermore, there have been a few previous studies that used a single IMU sensor to monitor the behavior of the knee joint angle for specific rehabilitation exercises, but not for more complex sports-related movements like side cutting. Hence, this study focused on validating a single IMU sensor and identifying the best placement to position it between the shank and thigh to measure the knee flexion angle at touchdown during side cutting. Fifty subjects were employed for this study and each person was asked to perform 60 leftwards side cuts. The first 20 side cuts were at 90 degrees, the second 20 were at 45 degrees, and the rest were at various angles between the running line and 90 degrees. Data were collected using 12 IMU sensors placed on the right thigh and shank, as well as a Vicon video motion capture system. Random Forest Regression and Gradient Boosting Regression machine learning algorithms were applied to the IMU data. According to the results, the thigh is the best location for a single IMU sensor, and the knee flexion angle at touchdown can be measured with an IMU sensor placed on the thigh, with a mean Coefficient of determination of 0.91 (SD = 0.01), mean absolute error of 1.93 (SD = 0.12), and mean absolute percentage error of 0.08 (SD = 0.06). The results of this study show that a single IMU sensor can be used to successfully measure knee flexion angles at touchdown during side cutting. This finding could aid in the development of more compact and convenient IMU-based joint angle measurement devices in the future.en_US
dc.identifier.citationMalagalage Don, I. C. (2022). Using a single inertial measurement unit to measure the knee flexion angle at touchdown in side cutting movements (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca.en_US
dc.identifier.urihttp://hdl.handle.net/1880/115299
dc.identifier.urihttps://dx.doi.org/10.11575/PRISM/40305
dc.language.isoengen_US
dc.publisher.facultyKinesiologyen_US
dc.publisher.institutionUniversity of Calgaryen
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.en_US
dc.subjectACLen_US
dc.subjectInjuryen_US
dc.subjectACL Injuryen_US
dc.subjectSingle IMUen_US
dc.subjectside cuttingen_US
dc.subjectanterior cruciate ligamenten_US
dc.subjectACL injury predictionen_US
dc.subjectWearable Technologyen_US
dc.subjectelectronic textilesen_US
dc.subjectmachine learningen_US
dc.subjectknee flexion angleen_US
dc.subjecttouchdownen_US
dc.subjectvideo motion captureen_US
dc.subjectViconen_US
dc.subjectPythonen_US
dc.subjectinertial measurement uniten_US
dc.subjectJoint Angleen_US
dc.subjectKneeen_US
dc.subjectMixture of expertsen_US
dc.subject.classificationHealth Care Managementen_US
dc.subject.classificationOccupational Health and Safetyen_US
dc.subject.classificationRehabilitation and Therapyen_US
dc.subject.classificationChemistry--Analyticalen_US
dc.subject.classificationStatisticsen_US
dc.subject.classificationArtificial Intelligenceen_US
dc.subject.classificationEngineering--Biomedicalen_US
dc.subject.classificationEngineering--Electronics and Electricalen_US
dc.subject.classificationEngineering--Mechanicalen_US
dc.subject.classificationTextile Technologyen_US
dc.titleUsing a Single inertial measurement unit to measure the knee flexion angle at touchdown in side cutting movementsen_US
dc.typemaster thesisen_US
thesis.degree.disciplineKinesiologyen_US
thesis.degree.grantorUniversity of Calgaryen_US
thesis.degree.nameMaster of Science (MSc)en_US
ucalgary.item.requestcopytrueen_US
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