Abstract: An isokinetic resistance apparatus includes a motor having an output shaft and a motor controller adapted to control power to the motor to maintain a first constant rotational speed of the output shaft. The output shaft of the motor rotates a driven shaft in a first rotational direction at a second constant rotational speed. A force receiving member is coupled with the driven shaft by a force transmitting linkage having a unidirectional clutch. A force exerted upon the force receiving member in the first rotational direction is transmitted through the driven shaft and the drive linkage to the output shaft of the motor. The motor controller adjusts power to the motor to compensate for such force and proportionately increase resistance to maintain the first constant rotational speed of the output shaft.