NF EN ISO 8996

NF EN ISO 8996

December 2021
Standard Current

Ergonomics of the thermal environment - Determination of metabolic rate

This document specifies different methods for the determination of metabolic rate in the context of ergonomics of the thermal working environment. It can also be used for other applications, e.g. the assessment of working practices, the energetic cost of specific jobs or sport activities and the total energy cost of an activity. The methods are classified in four levels of increasing accuracy: level 1, Screening, with a table giving examples of activities with low, moderate and high metabolic rates; level 2, Observation, where the metabolic rate is estimated by a time and motion study; level 3, Analysis, where the metabolic rate is estimated from heart rate recordings or accelerometers measurements; and level 4, Expertise, where more sophisticated techniques are described. The procedure to put into practice these methods is presented and the uncertainties are discussed.

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Main informations

Collections

National standards and national normative documents

Thematics

QSE, Accessibilité, Gestion des risques et SST, Silver économie, Sécurité

Publication date

December 2021

Number of pages

40 p.

Reference

NF EN ISO 8996

ICS Codes

13.180   Ergonomics

Classification index

X35-205

Print number

1

International kinship

ISO 8996:2021

European kinship

EN ISO 8996:2021
Sumary
Ergonomics of the thermal environment - Determination of metabolic rate

This document specifies different methods for the determination of metabolic rate in the context of ergonomics of the thermal working environment. It can also be used for other applications, e.g. the assessment of working practices, the energetic cost of specific jobs or sport activities and the total energy cost of an activity. The methods are classified in four levels of increasing accuracy: level 1, Screening, with a table giving examples of activities with low, moderate and high metabolic rates; level 2, Observation, where the metabolic rate is estimated by a time and motion study; level 3, Analysis, where the metabolic rate is estimated from heart rate recordings or accelerometers measurements; and level 4, Expertise, where more sophisticated techniques are described. The procedure to put into practice these methods is presented and the uncertainties are discussed.

Replaced standards (1)
NF EN ISO 8996
February 2005
Standard Cancelled
Ergonomics of the thermal environment - Determination of metabolic rate

The metabolic rate, as a conversion of chemical into mechanical and thermal energy, measures the energetic cost of muscular load and gives a numerical index of activity. Metabolic rate is an important determinant of the comfort or the strain resulting from exposure to a thermal environment. In particular, in hot climates, the high levels of metabolic heat production associated with muscular work aggravate heat stress, as large amounts of heat need to be dissipated, mostly by sweat evaporation. ISO 8996:2004 specifies different methods for the determination of metabolic rate in the context of ergonomics of the climatic working environment. It can also be used for other applications -- for example, the assessment of working practices, the energetic cost of specific jobs or sport activities, the total cost of an activity, etc.

Table of contents
  • Avant-propos
  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Termes et définitions
  • 4 Les unités
  • 5 Les quatre niveaux des méthodes d'estimation du métabolisme énergétique
  • 6 Niveau 1, Typologies: classification du métabolisme énergétique par catégories
  • 7 Niveau 2, Observation
  • 9 Niveau 3, Analyse
  • 10 Niveau 4, Expertise
  • Annexe E (normative) Correction des mesures de la fréquence cardiaque pour tenir compte des effets thermiques
  • Annexe A (informative) Évaluation du métabolisme énergétique au niveau 1, Typologies
  • Annexe B (informative) Évaluation du métabolisme énergétique au niveau 2, Observation
  • Annexe C (informative) Évaluation du métabolisme énergétique au niveau 3, Analyse
  • Annexe D (informative) Évaluation du métabolisme énergétique au niveau 4, Expertise
  • Bibliographie
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