In the present invention, the movement command selected by the central nervous system for achieving an intended movement is estimated with three feature values on the basis of a musculoskeletal model using the concepts of agonist-antagonist muscle pair ratio and agonist-antagonist muscle pair sum. The movement analysis device is provided with: a muscle potential-measuring unit (20) for measuring the muscle potential of a moving person; a movement-measuring unit (30) for measuring body movement; and a rigid ellipse-calculating section (108), an equilibrium point-calculating section (107), and a section (106) for calculating muscle synergy, which is the base vector describing the equilibrium point, for calculating, on the basis of a musculoskeletal model, the respective feature values of a rigid ellipse, an equilibrium point, and muscle synergy, which is the base vector describing the equilibrium point, at an operating point from the measurement information obtained by the measuring units (20, 30).
MOVEMENT ANALYSIS DEVICE, MOVEMENT ANALYSIS METHOD, AND MOVEMENT ANALYSIS PROGRAM