ABSTRACT
Fatigue is defined by the Health of Munition Workers Committee as “the sum of the results of activity which show themselves in a diminished capacity for doing work.” Subjective fatigue tends to be cumulative, and to react on the health of the worker, and if his health gives way he may perforce lose his productive capacity entirely until his health is regained. Numerous attempts have been made to measure fatigue experimentally by laboratory methods, and these investigations have thrown much light on the nature of fatigue, and its localisation. Performance tests might be thought to yield a direct quantitative measure of the true capacity for work possessed by a manual labourer, but this is by no means always the case.
