The use of laboratory and participatory ergonomic research models to investigate working posture in industry
Why this work is in the frame
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Bibliographic record
Abstract
Consensus on physical mechanisms linking work posture to discomfort and disorder risk has not been reached. The objective of this dissertation was to use a series of laboratory studies to identify measurements associated with discomfort and disorder risk in lower limb, back and neck/shoulder regions, and assess how these measurement outcomes differ between standing, seated and sit-standing postures. Participatory intervention methods were also used to investigate workplace factors that impact on posture selection and rotation. In the core set of investigations, healthy participants performed an industrially-modelled box-folding task over three 34-minute sessions in standing, seated and sit-standing postures (developed using a novel foot stand) while lower limb vascular parameters, trunk and upper limb muscular parameters, postural kinetics and discomfort were measured. Links between discomfort in various body regions and changes in the vascular, muscular and kinetic outcomes were investigated within and between postures. Investigation at a partner enterprise was conducted using 'participatory ergonomics' investigation methods and establishment of an "Ergonomics Team". Results show that during standing work, increases in blood volume and postural sway are associated with lower limb discomfort, and initially higher levels of shared activation between bilateral hip musculature are associated with higher levels of back discomfort. In comparison to standing, seated work leads to improved lower limb vascular and discomfort outcomes, but increases muscular demands and discomfort in the back and neck/shoulder regions. Also in comparison to standing, the sit-standing posture led to improved lower limb outcomes, with no significant differences in back and neck/shoulder outcomes. Together, findings reveal that each posture has positive and negative consequences. Data suggests that frequent (15-20min) rotation between postures may prevent onset of unwanted effects. Meanwhile, early investigations at the workplace revealed key policy, work organization and design issues that influenced the choice of appropriate laboratory methods and may affect knowledge uptake related to posture selection and rotation in the plant. As such, an integrated, participatory ergonomics approach may be optimal in ensuring that relevant laboratory methods are developed to produce usable knowledge for the workplace, and key knowledge translation strategies are in place for dissemination back to the workplace.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.002 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it