Abstract: A process and apparatus for isokinetic muscular exercise wherein the speed of the exercise movement and the resistive forces are regulated to preset or predetermined values which are adjustable throughout the exercise movement in accordance with an exercise program tailored to the skill and requirements of the exerciser. When the exerciser does not meet the prescribed minimums in the program performance, the exercising apparatus automatically provides assistance so that he will maintain the programmed rate of movement. The exerciser is classically conditioned to maximum ability by administration to him of a disciplinary conditioning signal that is proportional to the amount of assistance required to be administered by the machine.