The external stimulus application system includes an external stimulus unit that applies an external stimulus to a target site in the user's body, a detection unit that detects changes in the detected site in the user's body during the user's operation, and detection detected by the detection unit. It is configured to include a control unit that causes the external stimulus unit to generate a stimulus when the value satisfies a predetermined condition, and a storage unit that stores the detected value.外部刺激付与システムを、ユーザの体における対象部位に外部刺激を付与する外部刺激部と、ユーザの動作中、ユーザの体における被検出部位の変化を検出する検出部と、検出部が検出した検出値が、所定条件を満たす場合に外部刺激部において刺激を発生させる制御部と、検出値を記憶する記憶部と、を備えるように構成する。
