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Identification of physically demanding work tasks among cleaners: field study using electromyography.

Hao Man1, Javier Rueda1, Jesús Vega2

  • 1Universidad Politécnica de Madrid, Departamento de Salud y Rendimiento Humano, C/ de Martín Fierro, 7, Madrid 28040, Spain.

Annals of Work Exposures and Health
|June 24, 2024
PubMed
Summary

This study identified the most physically demanding cleaning tasks for cleaners' forearms. Identifying high-force and static overload tasks can inform the development of better tools to prevent chronic pain.

Keywords:
cleaning taskselectromyographyforearmwork-related musculoskeletal disorders

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Area of Science:

  • Occupational Health
  • Biomechanics
  • Ergonomics

Background:

  • Chronic forearm pain is prevalent among cleaners, yet specific high-risk tasks are not well-defined.
  • Understanding muscle activity during cleaning is crucial for preventing work-related musculoskeletal disorders.

Purpose of the Study:

  • To identify the most physically demanding cleaning tasks for forearm muscles.
  • To quantify forearm muscle activity during common cleaning activities.
  • To provide data for the development of ergonomic tools and interventions.

Main Methods:

  • Field study involving 7 healthy cleaners in a real work environment.
  • Electromyography (EMG) recorded from flexor carpi ulnaris (FCU) and extensor carpi radialis (ECR) muscles.
  • EMG data normalized to maximal voluntary isometric contractions (MVIC) to assess muscle load.

Main Results:

  • High-force tasks for FCU included rough floor, dirty rough floor, and office floor mopping.
  • High-force tasks for ECR included mopping high walls, ceiling mopping, and baize cleaning.
  • Static overload tasks identified for FCU and ECR involved various mopping and wall/ceiling cleaning activities.

Conclusions:

  • Specific cleaning tasks impose significant high-force and static loads on forearm muscles.
  • Recommendations include developing improved tools to mitigate muscle overload and prevent chronic pain in cleaners.