ABSTRACT
Most definitions of the state, or process, of fatigue agree that it is marked by a diminution in the capacity for work and by subjective feelings which are often accompanied by a disinclination for work and a desire for rest. It has been shown by Muscio "that felt tiredness has a significant correlation with fatigue tested objectively," and we may use it with caution as a test of the success of attempts to eliminate fatigue provided that it is well supported by objective evidence. The increases in output due to the introduction of rest pauses are brought about, it appears, by the retarding of the development of fatigue. Excessive fatigue not only diminishes output, but also increases the number of accidents, the waste due to spoiled work and the waste due to excessive labour turnover, and makes the workers less efficient and less satisfied because of the ill-health which it produces.
