1 Scope
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.