A static dynamic exercise apparatus comprising; a. at least one spatially displaceable object having a predetermined mass movably coupled to a support frame and coupled to a force applicator capable of transmitting a user-applied force to the spatially displaceable object ; b. a resistance system coupled to the spatially displaceable object and the force applicator capable of producing a variable resistance to movement of the spatially displaceable object and the force applicator , including at least a resistance to movement equal to or greater than the user-applied force and wherein the resistance system may be reversibly alternated between at least two predetermined levels of resistance, so that a first resistance is preventing the user-applied force from displacing the spatially displaceable object , and this resistance is releasable such that the resistance system generates a second resistance less than the user-applied force, thereby allowing the user to spatially displace the spatially displaceable object , and wherein the second resistance is as low as can be practically achieved, given the necessary constraints of friction within the mechanism of the apparatus , wherein the resistance system further comprises a pressure generator capable of creating a pressure in fluid communication with a resistance interlock , wherein pressure produced by the pressure generator is transmissible to the resistance interlock , thereby creating the variable resistance to movement of the spatially displaceable object , and wherein the support frame further comprises at least one rail having a length, a rail lower end and a rail upper end , slidably coupled at the first predetermined position to at least one object selected from the objects consisting of the spatially displaceable object and the force applicator , wherein the spatially displaceable object may be displaced to a second predetermined position on the rail length by the application of the user-applied force to the force applicator , and wherein the rail lower end has a rail lower joint rotably coupled to a rotable rail attachment on the support frame and the rail upper end has a rotation channel engagement area movable within a rotation channel on the frame allowing a predetermined degree of rotational movement of the rail relative to the support frame . a. at least one spatially displaceable object having a predetermined mass movably coupled to a support frame and coupled to a force applicator capable of transmitting a user-applied force to the spatially displaceable object ; b. a resistance system coupled to the spatially displaceable object and the force applicator capable of producing a variable resistance to movement of the spatially displaceable object and the force applicator , including at least a resistance to movement equal to or greater than the user-applied force and wherein the resistance system may be reversibly alternated between at least two predetermined levels of resistance, so that a first resistance is preventing the user-applied force from displacing the spatially displaceable object , and this resistance is releasable such that the resistance system generates a second resistance less than the user-applied force, thereby allowing the user to spatially displace the spatially displaceable object , and wherein the second resistance is as low as can be practically achieved, given the necessary constraints of friction within the mechanism of the apparatus , wherein <EOS>