The present invention provides a program capable of assessing the muscle tone of the exerciser based on the captured images of the posture of the exerciser. The above object is achieved by a program causing a computer apparatus to execute assessment of muscle tone of a client, the program causing the computer apparatus to function as: an image capturer that captures an image of a posture of the client in a steady state and/or an image of a posture of the client in a moving state； and an assessor that assesses the muscle tone of the client based on a position of a prescribed body site of the client, an inclination of the prescribed body site of the client, and/or positional relationships among a plurality of prescribed body sites in the image captured by the image capturer.
