| abstract |
(57) [Summary] To accurately determine muscle fatigue in a healthy living body. In step S2, a pulse voltage is applied to a driver from an electrostimulation electrode 12, and an electromyogram 22 detects an evoked myoelectric potential induced by application of the pulse voltage. Computer 26 Calculates the average value of the amplitude of the evoked myoelectric potential in S4 and stores it in the memory 28 as an initial value. In the frequency analyzer 24, the power spectrum distribution of the evoked myoelectric potential is obtained, and the calculator 26 calculates the center frequency of the power spectrum distribution in S5 and stores it in the memory 28 as an initial value. Muscle fatigue is determined when the average value of the amplitude calculated every predetermined time decreases by 10% or more from the initial value, and when the center frequency calculated every predetermined time decreases by 5 Hz or more from the initial value. |