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Investigation of precision task demands on workers' muscular activities, heart rate, and perceived exertion rating.

BACKGROUND: Manual material handling (MMH) tasks significantly contribute to musculoskeletal disorders in manual workers. OBJECTIVES: In this study, we assessed the physical factors of precision lifting tasks that affect muscular activities (electromyography, EMGs), heart rate, and perceived exertio...

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Published in:Work Vol. 72; no. 4; pp. 1443 - 1454
Main Authors: Ramadan, Mohamed Z., Alferdaws, Fares F.
Format: research tables/charts Journal Article
Published: Sage Publications Inc. 2022
Online Access:View this record in EBSCOhost
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      dt: 2022
      vid: 72
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      pub: Sage Publications Inc.
      place: Thousand Oaks, California
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        10.3233/WOR-205151
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        atl: Investigation of precision task demands on workers' muscular activities, heart rate, and perceived exertion rating.
      aug:
        au:
          Ramadan, Mohamed Z.
          Alferdaws, Fares F.
        affil: Production Engineering Department, Helwan University, Cairo, Egypt
      sug:
        subj:
          Precision
          Task Performance and Analysis
          Blue Collar Workers
          Muscle, Skeletal Physiology
          Heart Rate
          Exertion
          Lifting Adverse Effects
          Occupational Safety
          Shoes
          Human
          Male
          Adult
          Anthropometry
          Electromyography
          Analysis of Variance
          Data Analysis Software
          Descriptive Statistics
          Adult: 19-44 years
          Male
      ab: BACKGROUND: Manual material handling (MMH) tasks significantly contribute to musculoskeletal disorders in manual workers. OBJECTIVES: In this study, we assessed the physical factors of precision lifting tasks that affect muscular activities (electromyography, EMGs), heart rate, and perceived exertion rating in ten healthy male workers aged 25–35 years, while considering the safety aspect of the common types of safety footwear. METHODS: The independent variables that were assessed are as follows: 1) lifting method (precise and inexact), 2) lifting frequency (one and four liftings/min), and 3) type of safety footwear worn by the worker (light, medium, or heavy). The response variables data, represented by EMG signals, for four muscular activities (biceps brachii, deltoid, trapezius, and erector spinae), heart rate, and perceived exertion were analyzed using a three-factor within-subjects design. RESULTS: The results showed that wearing heavy safety shoes increases the effort used with precise lifting methods in trapezius and erector spinae muscular activities. We also observed that the heart rate and perceived exertion increased rapidly at four lifts/min compared to one lift/min, regardless of the lifting method. CONCLUSIONS: The advantages of choosing appropriate safety footwear must be carefully assessed before replacing the conventional working safety shoes.
      pubtype: Academic Journal
      doctype:
        research
        tables/charts
        Journal Article
      ougenre: Article
    language: English
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