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The effects of a simulated occupational kneeling exposure on squat mechanics and knee joint load during gait

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dc.contributor.authorTennant, Liana M.
dc.contributor.authorChong, Helen C.
dc.contributor.authorAcker, Stacey M.
dc.date.accessioned2018-01-29T19:33:08Z
dc.date.available2018-01-29T19:33:08Z
dc.date.issued2017-12-01
dc.descriptionThis is an Accepted Manuscript of an article published by Taylor & Francis in Ergonomics on 2017-12-01, available online: http:/dx.doi.org/10.1080/00140139.2017.1411529en
dc.description.abstractOccupational kneeling is associated with an increased risk for tibiofemoral knee osteoarthritis. Forces on the knee in the kneeling posture, as well as the greater incidence of meniscus tears among workers, likely contribute to the increased risk. We hypothesise that an additional mechanism may contribute – altered neuromuscular control due to prolonged high knee flexion. Forty participants (20 male, 20 female) completed an evaluation of gait and squatting before, immediately following, and 30 min following a 30 min simulated occupational kneeling exposure. An increase in the peak external knee adduction moment and a delay in vastus medialis activation onset during walking were observed post-kneeling, as well as increased frontal plane knee motion during squatting. This was the first investigation to find changes in high flexion transitions as a result of kneeling. Greater frontal plane knee motion may increase the risk for meniscal tears, and subsequently, knee osteoarthritis.Practitioner Summary: A 30 min simulated occupational kneeling exposure resulted in small but significant gait changes. The greatest effect was on frontal plane knee movement during squatting, which is especially relevant to occupations requiring frequent kneeling/squatting. This increased motion may indicate an increased risk of injury, which supports a link to knee osteoarthritis.en
dc.description.sponsorshipNational Sciences and Engineering Council of Canada (NSERC)en
dc.description.sponsorshipOntario Provincial Government (OGS) (LT)en
dc.description.sponsorshipNSERC Discovery [grant number 418647] (SA).en
dc.identifier.urihttp:/dx.doi.org/10.1080/00140139.2017.1411529
dc.identifier.urihttp://hdl.handle.net/10012/12972
dc.language.isoenen
dc.publisherTaylor and Francisen
dc.subjectBiomechanicsen
dc.subjectergonomicsen
dc.subjectkneeen
dc.subjectmusculoskeletal disordersen
dc.subjectosteoarthritisen
dc.titleThe effects of a simulated occupational kneeling exposure on squat mechanics and knee joint load during gaiten
dc.typeArticleen
dcterms.bibliographicCitationTennant, L. M., Chong, H. C., & Acker, S. M. (2017). The effects of a simulated occupational kneeling exposure on squat mechanics and knee joint load during gait. Ergonomics, 0(0), 1–14. https://doi.org/10.1080/00140139.2017.1411529en
uws.contributor.affiliation1Faculty of Applied Health Sciencesen
uws.contributor.affiliation2Kinesiologyen
uws.peerReviewStatusRevieweden
uws.scholarLevelFacultyen
uws.typeOfResourceTexten
uws.typeOfResourceTexten

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