Biological information acquisition method, program, and biological information acquisition system

The problem addressed by the present disclosure is to more easily recognize changes in muscles of a living body. A biological information acquisition method according to the present disclosure includes an application step and an acquisition step. The applying step includes applying an electrical signal (Sig1) to the muscle (A11) of the living body (A1). The acquiring step includes acquiring, as biological information, information relating to the muscle (A11) of the living body (A1) on the basis of a rate of change relating to the impedance of the electrical signal (Sig1) applied in the applying step. 本公开要解决的问题是更容易识别生物体的肌肉中的变化。根据本公开的生物信息获取方法包括施加步骤和获取步骤。施加步骤包括将电信号(Sig1)施加到生物体(A1)的肌肉(A11)。获取步骤包括基于与在施加步骤中施加的电信号(Sig1)的阻抗有关的变化率，获取与生物体(A1)的肌肉(A11)有关的信息作为生物信息。