This myoelectric potential processing apparatus (1) is provided with: a storage device (10) for storing myoelectric potential data (11) of a predetermined muscle; an onset detection unit (23) for detecting, from the myoelectric potential data (11), onset zones in which the myoelectric potential is increased due to repetitive motion of a person who is exercising; and an on-off index processing unit (25) for calculating, for each onset zone, the variance of a probability distribution obtained by normalizing a root mean square value of the myoelectric potential, and outputting the calculated variance as an on-off index for each onset zone.
MYOELECTRIC POTENTIAL PROCESSING APPARATUS, MYOELECTRIC POTENTIAL PROCESSING METHOD, AND MYOELECTRIC POTENTIAL PROCESSING PROGRAM