抄録
It is difficult or almost impossible to give a scientific definition of fatigue. In certain text books of physiology, fatigue is defined as the lowering of activity as the result of preceding activity of a whole organism or an organ. But such a definition is merely formal so long as activity is difficult to express in purely scientific terms. A great number of methods or tests have hitherto been proposed for the measurement of fatigue, and they may be useful so long as they express certain features of fatigue, for we must be acquainted with all functional changes of the body in order to get a complete information of fatigue. It may be right so long as academic interest is concerned, but in practice, it is demanded to resort to a few methods which represent the most fundamental feature of fatigue. The procedure should be as simple as possible, and the result should be clear cut and in good harmony with physiological and psychological common sense. Moreover, the procedure should neither inflict any pain on the subject nor lower his working efficiency. These demands seem, to some extent, to be satisfied by our method which will be reported in the following.
