Interrelationships between spinal and pelvic angles and hip muscle indices and their implications for workspace design

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dc.contributor.authorBridger, Robert Sen_ZA
dc.date.accessioned2018-01-31T13:50:15Z
dc.date.available2018-01-31T13:50:15Z
dc.date.issued1991en_ZA
dc.description.abstractThe shape of the lumbar and thoracic spinal curves in healthy subjects, when standing and when adopting a variety of working positions, was investigated using angular measures. The hypothesis that spinal and pelvic posture is determined by body position was supported. The mechanism by which body position influences spinal and pelvic posture was investigated using angular indices of the lengths of the hip flexors and extensors. The hypothesis that hamstring stretch determines postural adaptation to sitting positions was not supported. A multivariate analysis revealed that an index of iliopsoas length was the best predictor of posterior pelvic tilt in a variety of sitting positions. A supplementary investigation was carried out using data on the range of motion of the pelvis in the different body positions and its relationship to the muscle length indices. The role of the hamstring muscles in sitting posture was clarified. Some electromyographic data is presented to further illustrate the effect of body position on the role of the hip and trunk muscles in posture. A replication of the main findings and an investigation of some of the practical implications of the work were carried out drawing attention to some mechanisms of postural stress, potential problems of increased lumbar lordosis and their cost-effective alleviation through workspace design. The provision of a footrest, for example, was found to have significant effects on lumbar and pelvic angles in standing as well as in sitting. Further research into standing posture in the workplace is indicated by these findings. Some hypotheses for future investigation are presented.en_ZA
dc.identifier.apacitationBridger, R. S. (1991). <i>Interrelationships between spinal and pelvic angles and hip muscle indices and their implications for workspace design</i>. (Thesis). University of Cape Town ,Faculty of Health Sciences ,Department of Human Biology. Retrieved from http://hdl.handle.net/11427/27182en_ZA
dc.identifier.chicagocitationBridger, Robert S. <i>"Interrelationships between spinal and pelvic angles and hip muscle indices and their implications for workspace design."</i> Thesis., University of Cape Town ,Faculty of Health Sciences ,Department of Human Biology, 1991. http://hdl.handle.net/11427/27182en_ZA
dc.identifier.citationBridger, R. 1991. Interrelationships between spinal and pelvic angles and hip muscle indices and their implications for workspace design. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Bridger, Robert S AB - The shape of the lumbar and thoracic spinal curves in healthy subjects, when standing and when adopting a variety of working positions, was investigated using angular measures. The hypothesis that spinal and pelvic posture is determined by body position was supported. The mechanism by which body position influences spinal and pelvic posture was investigated using angular indices of the lengths of the hip flexors and extensors. The hypothesis that hamstring stretch determines postural adaptation to sitting positions was not supported. A multivariate analysis revealed that an index of iliopsoas length was the best predictor of posterior pelvic tilt in a variety of sitting positions. A supplementary investigation was carried out using data on the range of motion of the pelvis in the different body positions and its relationship to the muscle length indices. The role of the hamstring muscles in sitting posture was clarified. Some electromyographic data is presented to further illustrate the effect of body position on the role of the hip and trunk muscles in posture. A replication of the main findings and an investigation of some of the practical implications of the work were carried out drawing attention to some mechanisms of postural stress, potential problems of increased lumbar lordosis and their cost-effective alleviation through workspace design. The provision of a footrest, for example, was found to have significant effects on lumbar and pelvic angles in standing as well as in sitting. Further research into standing posture in the workplace is indicated by these findings. Some hypotheses for future investigation are presented. DA - 1991 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1991 T1 - Interrelationships between spinal and pelvic angles and hip muscle indices and their implications for workspace design TI - Interrelationships between spinal and pelvic angles and hip muscle indices and their implications for workspace design UR - http://hdl.handle.net/11427/27182 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/27182
dc.identifier.vancouvercitationBridger RS. Interrelationships between spinal and pelvic angles and hip muscle indices and their implications for workspace design. [Thesis]. University of Cape Town ,Faculty of Health Sciences ,Department of Human Biology, 1991 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/27182en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Human Biologyen_ZA
dc.publisher.facultyFaculty of Health Sciencesen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherInterior design and furnishings.en_ZA
dc.subject.otherPelvimetryen_ZA
dc.subject.otherSpine.en_ZA
dc.subject.otherPelvisen_ZA
dc.titleInterrelationships between spinal and pelvic angles and hip muscle indices and their implications for workspace designen_ZA
dc.typeDoctoral Thesis
dc.type.qualificationlevelDoctoral
dc.type.qualificationnamePhDen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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