Full Text Available
Note: Clicking the button above will open the full text document at the original institutional repository in a new window.
Interrelationships between spinal and pelvic angles and hip muscle indices and their implications for workspace design
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 pos...
Saved in:
| Main Author: | |
|---|---|
| Format: | Thesis |
| Language: | English |
| Published: |
Department of Human Biology
2018
|
| Subjects: | |
| Tags: |
No Tags, Be the first to tag this record!
|
| _version_ | 1867613281326202880 |
|---|---|
| access_status_str | Open Access |
| author | Bridger, Robert S |
| author_browse | Bridger, Robert S |
| author_facet | Bridger, Robert S |
| author_sort | Bridger, Robert S |
| collection | Thesis |
| description | 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. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/27182 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:33:37.862Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| publisher | Department of Human Biology |
| publisherStr | Department of Human Biology |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/27182 Interrelationships between spinal and pelvic angles and hip muscle indices and their implications for workspace design Bridger, Robert S Interior design and furnishings. Pelvimetry Spine. Pelvis 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. 2018-01-31T13:50:15Z 2018-01-31T13:50:15Z 1991 Doctoral Thesis Doctoral PhD http://hdl.handle.net/11427/27182 eng application/pdf Department of Human Biology Faculty of Health Sciences University of Cape Town |
| spellingShingle | Interior design and furnishings. Pelvimetry Spine. Pelvis Bridger, Robert S Interrelationships between spinal and pelvic angles and hip muscle indices and their implications for workspace design |
| thesis_degree_str | Doctoral |
| title | Interrelationships between spinal and pelvic angles and hip muscle indices and their implications for workspace design |
| title_full | Interrelationships between spinal and pelvic angles and hip muscle indices and their implications for workspace design |
| title_fullStr | Interrelationships between spinal and pelvic angles and hip muscle indices and their implications for workspace design |
| title_full_unstemmed | Interrelationships between spinal and pelvic angles and hip muscle indices and their implications for workspace design |
| title_short | Interrelationships between spinal and pelvic angles and hip muscle indices and their implications for workspace design |
| title_sort | interrelationships between spinal and pelvic angles and hip muscle indices and their implications for workspace design |
| topic | Interior design and furnishings. Pelvimetry Spine. Pelvis |
| url | http://hdl.handle.net/11427/27182 |
| work_keys_str_mv | AT bridgerroberts interrelationshipsbetweenspinalandpelvicanglesandhipmuscleindicesandtheirimplicationsforworkspacedesign |