A muscle training device includes an insulating sheet configured such that electrodes are exposed on an inner surface closely contacting a body surface above a muscle, a stimulation signal output unit configured to output an electrical stimulation signal to a stimulation electrode which is at least any of the electrodes, a myoelectric signal detection unit configured to detect, while output of the electrical stimulation signal is stopped, a muscle action potential shown at a myoelectric detection electrode which is at least any of the electrodes, and a muscle condition determination unit configured to determine the state of action of the muscle from the muscle action potential of the myoelectric detection electrode. The stimulation electrode to which the electrical stimulation signal is output and/or the method for outputting the electrical stimulation signal are/is adjusted according to the state of action of the muscle determined by the muscle condition determination unit.提供一種無須準備用以進行肌肉的活動狀態評估的其他裝置,按照肌肉的活動狀態,以最適方法,將肌肉進行電刺激的肌力訓練裝置。具備有:絕緣片材,其係在密接於肌肉的體表面的內面露出設有複數電極;刺激訊號輸出手段,其係將複數電極的至少任一電極設為刺激電極,對刺激電極輸出電刺激訊號;肌電訊號檢測手段,其係在停止電刺激訊號的輸出的期間,將複數電極的至少任一電極設為肌電檢測電極,檢測在肌電檢測電極所呈現的肌肉活動電位;及肌肉狀態判別手段,其係由肌電檢測電極的肌肉活動電位判別肌肉的活動狀態,由肌肉狀態判別手段所判別出的肌肉的活動狀態,調整輸出電刺激訊號的刺激電極或電刺激訊號的輸出方法。1‧‧‧肌力訓練裝置2、2a、2b、2c、2d‧‧‧電極3‧‧‧控制部4‧‧‧絕緣片材7‧‧‧連接電纜10‧‧‧訓練裝置本體11‧‧‧放大部12‧‧‧肌肉狀態判別部13‧‧‧切換器13a‧‧‧第1選擇端子s13b‧‧‧第2選擇端子14‧‧‧電刺激輸出部(第1刺激訊號輸出手段、第2刺激訊號輸出手段)15‧‧‧多工器16‧‧‧A/D轉換部17‧‧‧記憶部18‧‧‧操作部19‧‧‧顯示部
