An exercise apparatus comprising a weight stack comprised of one or more individual bodies of weight, a flexible elongated cable having a downstream portion that is interconnected to a user selectable number of the one or more individual bodies of weight that exert a first resistance and to a second resistance device that exerts a second resistance, a manually movable actuating device interconnected to a proximal end of the cable, the actuating device being manually movable by the user to exert an exercise speed, velocity, force, energy or power through the cable on the selectable number of one or more individual bodies of weight and on the second resistance device, the second resistance device exerting a second resistance that increases non-linearly with an increase in the degree of speed, velocity, force, energy or power exerted on the actuating device or on the second resistance device by the user.