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Control of posture during tasks representing common work-related postures - a reliability study.
Ramakrishnan Mani1, Stephan Milosavljevic, S John Sullivan
1a Centre for Health, Activity and Rehabilitation Research, School of Physiotherapy , University of Otago , Dunedin , New Zealand.
Ergonomics
|January 8, 2015
Summary
This study validates a task battery for assessing postural control, finding it reliable for work-related conditions. The measures are suitable for both lab and field research, offering dependable insights into postural demands.
Area of Science:
- Biomechanics
- Ergonomics
- Human Factors Engineering
Background:
- Assessing work-related postural demands requires reliable task batteries.
- Current evidence on the reliability of such task batteries is limited, hindering field research.
- Understanding postural control is crucial for preventing work-related musculoskeletal disorders.
Purpose of the Study:
- To investigate the intrasession reliability and systematic variation of center of pressure (COP) measures.
- To evaluate a task battery representing common work-related postural conditions.
- To determine the suitability of the task battery for field and laboratory research.
Main Methods:
- Utilized a task battery including lifting, limits of stability, and bipedal/unipedal stances.
- Collected center of pressure (COP) data using force plates during repeated task performance.
- Processed COP signals to derive time-domain measures and analyzed reliability (ICC, SEM%).
Main Results:
- 13 out of 19 COP measures demonstrated excellent relative reliability (ICC ≥ 0.75).
- Acceptable absolute reliability (SEM% ≤ 10) was found for these measures.
- Systematic variations in COP measures were generally within acceptable measurement error limits, except for unipedal stance and limits of stability tasks.
Conclusions:
- The validated task battery is reliable and suitable for comprehensive postural control evaluation.
- The findings support the use of this task battery in both field and laboratory settings.
- This research addresses the need for reliable outcome measures in postural control research.
