Maximum Acceptable Work Time for the Upper Limbs Tasks and Lower Limbs Tasks. Workload Limits

Leonardo Briceno, Juan Carlos Velásquez, Silvio Viña, Diana Marcela Velasquez

Research output: Contribution to conferencePosterpeer-review

Abstract

Introduction: The physical workload is a major occupational risk factor for workers. Currently the used methods to assess physical dynamic workload evaluate working with the whole body and do not discriminate the load of the body segments. Objective: Determine the maximum acceptable dynamic work time when the work is involves the whole body, the upper limbs and the lower limbs. Methods: Oxygen consumption measurement by ergospirometry and heart rate were monitored in 30 workers exposed to various loads executed with the whole body, legs and upper limbs. Anaerobic threshold was determined by respiratory quotient. This was used to calculate the acceptable dynamic work time. Results: Statistically significant differences were found between acceptable dynamic work time for upper limbs and lower limbs. Negative exponential correlation was found between the workload time, oxygen consumption and heart rate, so we found that R > 0.9 in all cases. We propose six regression equations to determine the acceptable dynamic work time. Conclusions: The acceptable dynamic work time for lower limbs and whole body is similar. The acceptable dynamic work time for upper limbs was significantly lower than acceptable dynamic whole body work time. The relative heart rate seems to be the best indicator to measure acceptable dynamic work time.
Translated title of the contributionTiempo de trabajo máximo aceptable para las tareas de los miembros superiores y de los miembros inferiores. Límites de carga de trabajo.
Original languageEnglish
Pages282-290
Number of pages9
DOIs
StatePublished - Aug 5 2018
Event20th Congress of the International Ergonomics Association, IEA 2018 - Florence, Italy
Duration: Aug 26 2018Aug 30 2018

Conference

Conference20th Congress of the International Ergonomics Association, IEA 2018
Country/TerritoryItaly
CityFlorence
Period8/26/188/30/18

Author Keywords

  • Concept
  • Oxygen uptake
  • Workload
  • Acceptable work time
  • Occupational health

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