A method for the assessment of fitness in aerobically taxing occupations.

A good level of physical fitness is a fundamental prerequisite of many occupations, hence the importance of valid methods of fitness assessment. A method, using submaximal treadmill exercise, was tested in a group of Urban Police Officers. Physiology variables and subjective perceptions were monitored. The trend of individual variables provided a means to define the "critical" capacity which corresponded to a mean value of 6.8 MET (a "heavy activity" according to Haskell's classification). This level is proposed as a predictor of endurance and could be used in follow-up fitness assessments.