Study of the Effect of Worker Characteristics on Maximum Acceptable Weight of Lift

Ahmad, Saman; Muzammil, Mohammad

doi:10.1007/978-3-030-94277-9_11

Cited by 2 publications

(2 citation statements)

References 38 publications

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“…Previous studies have identified a need to consider physiological implications in calculating RWL for all populations [ 29 ]. Barim et al showed that the inclusion of new physiological RNLE multipliers, one of which was BMI, improved risk assessment of musculoskeletal injuries [ 30 ].…”

Section: Discussionmentioning

confidence: 99%

The effect of clinically elevated body mass index on physiological stress during manual lifting activities

et al. 2022

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Individuals with a body mass index (BMI) classified as obesity constitute 27.7% of U.S. workers. These individuals are more likely to experience work-related injuries. However, ergonomists still design work tasks based on the general population and normal body weight. This is particularly true for manual lifting tasks and the calculation of recommended weight limits (RWL) as per National Institute of Occupational Safety & Health (NIOSH) guidelines. This study investigates the effects of BMI on indicators of physiological stress. It was hypothesized that, for clinically elevated BMI individuals, repeated manual lifting at RWL would produce physiological stress above safety limits. A repetitive box lifting task was designed to measure metabolic parameters: volume of carbon dioxide (VCO2) and oxygen (VO2), respiratory exchange ratio (RER), heart rate (HR), and energy expenditure rate (EER). A two-way ANOVA compared metabolic variables with BMI classification and gender, and linear regressions investigated BMI correlations. Results showed that BMI classification represented a significant effect for four parameters: VCO2 (p < 0.001), VO2 (p < 0.001), HR (p = 0.012), and EER (p < 0.001). In contrast, gender only had a significant effect on VO2 (p = 0.014) and EER (p = 0.017). Furthermore, significant positive relationships were found between BMI and VCO2 (R2 = 59.65%, p < 0.001), VO2 (R2 = 45.01%, p < 0.001), HR (R2 = 21.86%, p = 0.009), and EER (R2 = 50.83%, p < 0.001). Importantly, 80% of obese subjects exceeded the EER safety limit of 4.7 kcal/min indicated by NIOSH. Indicators of physiological stress are increased in clinically elevated BMI groups and appear capable of putting these individuals at increased risk for workplace injury.

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Section: Discussionmentioning

confidence: 99%

The effect of clinically elevated body mass index on physiological stress during manual lifting activities

et al. 2022

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“…Ahmad & Muzammil focused on application of revised NIOSH lifting equation (RNLE) on 44 workers (22 male and 22 female) to derive maximum acceptable weight limits (MAWL) for these workers. The study reveals the effect of change in age, BMI and gender is statistically significant on MAWL but height and acromial height has no statistical significance, so MAWL was evaluated as 19.3 Kgs for 75 percentile women as per RNLE guideline 28) . Ahmad & Muzammil also worked on evaluation done by revised NIOSH equation to build up a better version by modifying the multipliers to make it more realistic.…”

Section: Introductionmentioning

confidence: 99%

A Postural Risk Assessment of Manual Dairy Farm Workers using NIOSH Lifting Equation

Gurnani¹,

Singh²,

Sain³

et al. 2022

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The postural risk assessment plays a very important role in calculation of musculoskeletal fatigue in human beings. A study in similar contrast contributes to an enhanced intellect of NIOSH Lifting Equation in consideration to the weight lifting conditions of manual dairy farm workers through an exhaustive description of the process involved in measuring variables affecting the risk score of an individual. NIOSH Lifting Equation is an Ergonomic technique with a systematic approach to calculate the risk score of workers involved in frequent and heavy load lifting tasks. A data driven approach capturing both films and photographs was used for evaluation along with measurement tools to calculate risk score from initial to final point of loading. The evaluation resulted in Recommended Weight Limit (RWL) of 27.86 Kgs and Lifting Index (Li) of 1.23. A trained analyst helped handling the device and also the calculation of lifting index (Li) in dairy farm area. A revised form of NIOSH Lifting equation with systematic and reliable procedures resulted in modifications in design of workstations that involved frequent load lifting for workers in dairy farm, thereby reducing the musculoskeletal disorders.

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Study of the Effect of Worker Characteristics on Maximum Acceptable Weight of Lift

Cited by 2 publications

References 38 publications

The effect of clinically elevated body mass index on physiological stress during manual lifting activities

The effect of clinically elevated body mass index on physiological stress during manual lifting activities

A Postural Risk Assessment of Manual Dairy Farm Workers using NIOSH Lifting Equation

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