PROBLEM TO BE SOLVED: To provide a muscle fatigue output device etc. which improves the accuracy of output information regarding muscle fatigue.SOLUTION: A muscle fatigue output device 100 is provided with a myoelectric measurement unit 11 that acquires myoelectricity of a user, and a main control unit 10. The main control unit 10 (a) uses the myoelectricity to acquire a value for a frequency characteristic of the myoelectricity, (b) uses the myoelectricity to acquire a value for an amplitude characteristic of the myoelectricity, (c) acquires a ratio between the value for the frequency characteristic and the value for the amplitude characteristic as an index for the fatigue of the muscle of the user, and (d) outputs information based on an index of the fatigue of the muscle of the user.SELECTED DRAWING: Figure 38COPYRIGHT: (C)2018,JPO&INPIT【課題】出力する筋肉疲労の情報の精度を向上する筋肉疲労出力装置等を提供する。【解決手段】筋肉疲労出力装置100は、ユーザの筋電を取得する筋電計測部11と、メイン制御部10とを備える。メイン制御部10は、(a)筋電を用いて、筋電の周波数特性の値を取得し、(b)筋電を用いて、筋電の振幅特性の値を取得し、(c)ユーザの筋肉の疲労の指標として、周波数特性の値及び振幅特性の値の比率を取得し、(d)ユーザの筋肉の疲労の指標に基づく情報を出力する。【選択図】図38