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Peak impact forces, measured from seven male carpetlayers using a knee-kicker over 39 trials were 2933 N (SD 397), taking 9.5 ms (SD +/- 1.1) to reach peak. The knee-kicking cycle involved high knee decelerations of 880 m.s-2 (SD +/- 271). Angles at peak force for the knee (63 degrees SD +/- 10 degrees) and hip (80 degrees SD +/- 35 degrees) showed(More)
The objectives are to determine attitudes and beliefs among construction workers and supervisors related to taking action to reduce musculoskeletal injuries (MSIs). "Action" stage of change was confirmed if workers in the last 6 months are continuing to take steps to reduce MSIs. Surveys (520 workers; 35% and 171 supervisors; 67%) revealed that more workers(More)
Injury rates in Intermediate Care (IC) facilities are high and the factors related to these injuries are unclear. The objectives of this exploratory sub-study, which is part of a large multi-faceted study in 8 IC facilities are to: (1) evaluate EMG measured over a full-shift in the back and shoulders of 32 care aides (CAs) as an indicator of peak and(More)
BACKGROUND Measuring low back injury risk factors in field research presents challenges not encountered in laboratory environments. METHODS We compared the practical application of five measurement methods (observations, interviews, electromyography (EMG), inclinometry, and vibration monitoring) for 223 worker days in 50 heavy-industry worksites in(More)
OBJECTIVE Ergonomic assessment and recommendations may help people with arthritis maintain employment; however, most ergonomic tools are designed to assess injury risk in the general population and are not specific to the needs of people with inflammatory arthritis (IA). Our objectives were to design and pilot test an ergonomic assessment tool for people(More)
Few ergonomic measurement tools explicitly state when and how to sample exposures. Traditional ergonomic sampling has used short, task-based or worst-case measurements, but these may misrepresent exposures, since they neglect the temporal variations throughout the workday. Understanding the representativeness of data from shorter measurement durations(More)
The objective of this study was to use and evaluate three postural assessment methods for epidemiological studies of back disorders. The methods were: (1) a data-logging inclinometer; (2) observations by trained observers; (3) self-reports by employees. All methods were feasible in 50 heavy industry worksites. Inclinometry provided quantitative measures of(More)
We developed and evaluated an observational Back-Exposure Sampling Tool. A literature review suggested 53 exposure variables; these were reduced to 20 following field trials. Kappas for agreement beyond chance between six observers assessing exposures in 72 photos ranged from 0.21 to 1.0, with the highest values for posture type, trunk angle, manual(More)
Care aides (CAs) and licensed practical nurses (LPNs) in intermediate care (IC) facilities experience high risks of injury. Workload measures were examined in eight IC facilities to ascertain their relationships with musculoskeletal injury rates, pain, burnout, and self-reported health. Workload was measured using (1) focus groups and telephone interviews(More)
OBJECTIVES This study investigated the relationship between work-organization factors (job control, job demands, and workload measures) and the risk of lower-body musculoskeletal injury among health care workers. METHODS A four-year, retrospective cohort study of 3769 health care workers was carried out in one acute care hospital in the Canadian province(More)