Abstract: A system and method is provided for conditioning a group of muscles and joints of a subject including: a movement assembly including an arm having a handle, such that an angular position is created by the subject's joint when the subject grips the handle, a brake, connected to the movement assembly, configured to apply a work load to the movement assembly, and a sensor configured to sense the angular position of the movement assembly; and a computing device, in communication with the sensor and the brake, configured to sense the movement of the movement assembly relative to the brake, create an encoded signal representing the movement assembly and the movement over a period of time, and modify the brake to vary the work load during a movement of the movement assembly based on timing at the angular position and a predetermined regimen.