Journal article
The interrelationship of the thorax and pelvis under varying task constraints
Ergonomics, Vol.56(4), pp.659-666
2013
Abstract
The purpose of this study was to investigate the interrelationship between the thorax and pelvis during coupled movement patterns. Fifty-seven participants were assessed using an infrared motion analysis system to track trunk movement during maximal pelvis and thorax rotations over four trunk inclinations and two pelvic constraint conditions. A repeated-measures multivariate analysis of variance investigated the effects of forward trunk inclination and pelvic constraint on thorax and pelvic rotation. Forward trunk inclination from neutral to 45° resulted in a 46% (p <0.001) decrease in axial pelvic rotation and a 15% (p < 0.001) decrease in axial thorax rotation with an unconstrained pelvis. A constrained pelvis resulted in a 15% (p < 0.001) decrease in axial thorax rotation. An externally constrained pelvis allowed the thorax to achieve an average of 18° (SD = 2°) greater rotational range of motion across all angles. This study reinforced the importance of allowing the pelvis to rotate during whole body axial rotation tasks. Practitioner summary: Results indicated that maximum axial trunk rotation is best achieved in a neutral posture, when the pelvis is allowed to contribute and flexion at the hips should be minimised. For example, if a recumbent task requires rotation of the torso, then the chair seat should be allowed to swivel.
Details
- Title
- The interrelationship of the thorax and pelvis under varying task constraints
- Authors
- Elias Delphinus (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and EngineeringMark Sayers (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
- Publication details
- Ergonomics, Vol.56(4), pp.659-666
- Publisher
- Taylor & Francis Ltd.
- Date published
- 2013
- DOI
- 10.1080/00140139.2012.760755
- ISSN
- 0014-0139
- Organisation Unit
- School of Health - High Performance Sport; University of the Sunshine Coast, Queensland; School of Health and Sport Sciences - Legacy; School of Health - Sports & Exercise Science; School of Health and Behavioural Sciences - Legacy
- Language
- English
- Record Identifier
- 99450266002621
- Output Type
- Journal article
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- Web Of Science research areas
- Engineering, Industrial
- Ergonomics
- Psychology
- Psychology, Applied
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Source: InCites