A treadmill may include a deck, a first pulley incorporated into the deck, a second pulley incorporated into the deck, a tread belt surrounding the first pulley and the second pulley, a motor in mechanical communication with at least one of the first pulley and the second pulley to move the tread belt in a first direction, and a runaway mitigation mechanism in at least indirect mechanical communication with the motor. The runaway mitigation mechanism at least mitigates a motor runaway condition.

A request is received for a higher torque from a torque controller than is possible from a power supply. The torque controller is coupled to a motor and the power supply, and the motor is coupled to an actuator. The actuator ultimately establishes resistance for a user in an exercise. An energy storage device is discharged to the motor in order to generate the higher torque, wherein the energy storage device is indirectly coupled to the torque controller.

An exercise device comprising a metallic box, two motors mounted at left and right sides of the box, a mirror touch screen, a camera, a loudspeaker, two motors mounted at the left and right bottom of the box, movable arms at slide tracks at both sides, a voltage transformer for the mirror touch screen, and four drive boards for four motors. All these four motors connect with gear reducers. Four carriages ride on both sides of slide tracks. The upper left and right two carriages provide support for upper limbs exercise. The lower left and right two carriages provide support for lower limbs exercise.

A manually powered treadmill includes a frame; a first rotatable element coupled to the frame; a second rotatable element coupled to the frame; a plurality of bearings coupled to the frame; a running belt at least partly supported by the plurality of bearings, where at least a portion of the running belt defines a curved running surface; and a safety device coupled to at least one of the first rotatable element and the second rotatable element. The safety device is structured to substantially prevent rotation of the at least one of the first rotatable element and the second rotatable element in a first rotational direction and permit rotation of the at least one of the first rotatable element and the second rotatable element in a second rotational direction opposite the first rotational direction.

An improved exercise machine has a stationary longitudinal monorail structure that extends between front and back end stationary exercise platforms, and an exercise platform mounted on a levitated carriage that is reciprocally movable along the monorail between the stationary platforms. Magnetic elements arranged on various opposing surfaces of the carriage and monorail generate magnetic forces that levitate and stabilize the carriage as it moves relative to the monorail thus substantially eliminating contact friction. Springs selectively attachable to the movable platform provide a resistance force for exercising. Pseudo-levitation and eddy brake elements on the carriage and monorail structure further stabilize the carriage and platform.

An improved exercise machine has a stationary longitudinal monorail structure that extends between front and back end stationary exercise platforms, and an exercise platform mounted on a levitated carriage that is reciprocally movable along the monorail between the stationary platforms. Magnetic elements arranged on various opposing surfaces of the carriage and monorail generate magnetic forces that levitate and stabilize the carriage as it moves relative to the monorail thus substantially eliminating contact friction. Springs selectively attachable to the movable platform provide a resistance force for exercising. Pseudo-levitation and eddy brake elements on the carriage and monorail structure further stabilize the carriage and platform.

An exercise machine and a resistance and brake compound control structure are disclosed. The resistance and brake compound control structure includes a sleeve, a push rod, an elastic member, a compound operating member, and a pushing member. The push rod is disposed in the sleeve. The elastic member exerts a force to the push rod for giving the push rod a return elastic force. The compound operating member includes an operating portion and a screw rod. The screw rod has a pushing end extending into the sleeve. The pushing member is disposed in the sleeve in a non-rotatable manner. The pushing member has a threaded hole. The screw rod is screwed to the threaded hole. The exercise machine uses the resistance and brake compound control structure to adjust resistance and brake.

A method of varying a dynamic resistive force during a strength training exercise includes receiving a selection of the strength training exercise from a set of available strength training exercises and obtaining exercise logic for the strength training exercise from computer memory. The exercise logic provides instructions for generating a vector that defines the dynamic resistive force provided at an end effector of a strength training apparatus during the strength training exercise. The method includes determining a real-time geometric arrangement of a plurality of cables coupled to the end effector, generating, based on the real-time geometric arrangement of the plurality of cables and the exercise logic, time-varying operating setpoints for a plurality of actuator assemblies coupled to the plurality of cables, and exerting the dynamic resistive force at the end effector by controlling the plurality of actuator assemblies in accordance with the time-varying operating setpoints.

A gymnastic machine for weightlifting includes: a load-bearing frame, two opposite first lateral guides, upward-downward, developed according to a first direction, two first slides each slidingly constrained on a corresponding first lateral guide, two opposite second lateral guides, developed according to a second direction transversal to the first direction, and each defined on board of one of the first slides, two second slides each slidingly constrained on a corresponding second lateral guide, a lifting bar, each of the ends of the lifting bar being constrained to a corresponding second slide, a motorised transmission configured for applying to the first slides either an opposing force to an upward thrust force, or a downward traction force.

A training device and a training method for reducing hypertonic are disclosed. The training device includes a base, a driving circuit, two pedals, a control circuit, and a switch circuit. The driving circuit is fixed on the base. Each of the two pedals is coupled to the base. The driving circuit drives each of the two pedals to swing repeatedly between a first position and a second position relative to the base. When the control circuit executes a training program, the control circuit actuates the driving circuit.