Journal
APPLIED ERGONOMICS
Volume 40, Issue 1, Pages 1-7Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.apergo.2008.04.007
Keywords
Obesity; Lifting tolerance limits; Maximum acceptable weight of lift; Psychophysics; Lifting
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The maximum acceptable weights of lift (MAWL) of obese and non-obese participants were empirically investigated. Three obesity levels were considered: non-obese (18.5 kg/m(2) <= body mass index (BMI) <= 24.9 kg/m(2)), moderately obese (35kg/m(2) <= BMI <= 39.9kg/m(2)) and extrernely obese (BMI >= 40 kg/m(2)). Ten male and 10 female participants were recruited for each obesity level. The participants determined their MAWL for 18 different lifting task conditions (six lifting frequencies x three lifting heights). An analysis of variance (ANOVA) was conducted to determine the effects of obesity level, gender, lifting height, lifting frequency and their interactions on MAWL. Overall, the ANOVA results indicated that obesity does not reduce MAWL, and thus, suggested that the existing MAWL data can be used to accommodate both general and obese workers. However, further studies based on the biomechanical and physiological approaches are required to provide more complete understanding of obesity effects on lifting tolerance limits. (C) 2008 Elsevier Ltd. All rights reserved.
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