Provided is a fatigue determination device (140) that determines the fatigue state of a subject, wherein the fatigue determination device (140) comprises: an acquisition unit (11) that acquires a first indicator related to autonomic nervous function measured in a state where stimulation is not being imparted to the subject, and a second indicator related to autonomic nervous function measured in a state where stimulation has been imparted to the subject; and a determination unit (12) that determines the fatigue state of the subject on the basis of the amount of change between the first indicator and the second indicator.
FATIGUE DETERMINATION DEVICE, FATIGUE DETERMINATION METHOD, AND PROGRAM