JAMA. 1927;89(22):1887. doi:10.1001/jama.1927.02690220063025.
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The Source of Fatigue  In a recent lecture on fatigue, Dr. J. Kunze said that a practical method of determining the measure of fatigue is to trace the tired feeling to its source, to discover whether it is situated in that part of the system which has recently been exerted. Thus, if work has been done with the brain, and the tired feeling comes in the legs, which have been resting, it cannot be regarded as indicating any approach to overwork. It is easy to misunderstand the mental and physical sensations that are experienced from time to time; for instance, if a person who has just returned from a walk and experiences a sensation of fatigue stretches himself on a couch and laments a loss of his physical strength, his weariness may have nothing whatever to do with his muscles. What he imagines to be bodily fatigue may be purely


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