Methods and systems for controlling a force generator of an exercise apparatus are described wherein the method comprises determining or receiving angular positions of a rotatable axle of an exercise apparatus when a force is applied to a force receiving structure of the exercise apparatus, the rotatable axle being part of a mechanical power transmission system connecting the force receiving structure via the rotatable axis to a force generator which is controlled by a computer based on a kinematic model, the kinetic model representing equations of motion of the exercise the apparatus; determining or retrieving first geometrical scaling values associated with the angular positions and incorporating the first geometrical scaling values into the kinematic model to form a first modified kinematic model, the first geometrical scaling values being associated with a non- circular gear of a first predetermined non-circular geometry; and, determining applied force values for the angular positions, each applied force value representing a force that is applied to the force receiving structure; and, controlling the force generator based on first resistive force values to mimic an exercise apparatus comprising a mechanical power transmission system including the first non-circular gear, the first resistive force values being computed using the first modified kinematic model and the applied force values.

A cordless treadmill including a frame, a belt system. and a drop-in cartridge is disclosed. The cartridge includes a plurality of staggered rollers configured to provide tactile feedback to the user. The frame is adapted to receive the belt system and the cartridge as they are lowered into the frame, and the frame is adapted to place the belt of the belt system into tension as the belt system is lowered into the frame. An integrated flywheel generator system provides smooth operation of the treadmill and generates electricity to power additional systems.

A drag gain structure for the gravity wheel of fitness equipment includes an eccentric driving member disposed on the first side of the gravity wheel, which includes inner and outer side plate sections, and an interconnecting piece. The interconnecting piece is rotationally coupled to at least one of the plate sections. One end of outer side plate section is fitted over and fixed to the shaft, and one end of inner side plate section is connected to an eccentric position of gravity wheel through the first bias joint pin. A bearing pedestal is disposed on the second side of the gravity wheel, including a bearing screwed on the shaft, a pedestal shell fitted over the bearing and a radial protruding plate on the periphery of pedestal shell. The protruding end of the radial protruding plate is connected to an eccentric position of gravity wheel through the second bias joint pin.

The disclosure discloses a strength training equipment. The strength training equipment includes a speed changing device, which includes a driving motor and a speed changer, wherein the speed changer outputs the output of the driving motor after speed reduction; a differential mechanism, which is provided with a first output shaft and a second output shaft and can convert the output after speed changing by the speed changer into asymmetric force to be output from the first output shaft and the second output shaft; and a take-up device, which includes two take-up boxes which are connected with the first output shaft and the second output shaft respectively.

A running deck includes a frame defining two opposing sliding surfaces, and an endless slat belt including a plurality of slats each having an inner surface slidably supported on the sliding surfaces of the frame and a plurality of knuckles arranged at opposing side edges thereof and a plurality of connection devices respectively mounted in the knuckles between each two adjacent slats to pivotally connect each two adjacent slats together. The knuckles at the two opposite side edges are arranged in a staggered manner so that the slats can be closely and pivotally connected to one another by the pivot connection devices, simplifying the structure, reducing the weight, and enhancing the overall sense of beauty.

Patient aid devices and an associated method of supporting an upper extremity are described and include a mobile upper extremity support for the patient. A support assembly supports a first side of an upper body of the user for movement along a first rail. The support assembly also allows motion of a second side of an upper body relative to the first side.

Muscle resistance apparatus comprising a framework, at least one resistive force and a movable section. The movable section is linked to a resistive force, wherein a first part of the movable section is attached to the framework by a connection whereby it can be temporarily displaced, and a second part of the movable section is connected to the first part of the movable section by a second connection whereby it can be temporarily displaced. The first and second parts of the movable section are independently movable with respect to one another in an angular and/or linear fashion.

The present invention concerns a gymnastic machine of the type having movable steps, comprising a supporting frame, for the resting of said gymnastic machine on the floor, a movable stair comprising a plurality of elongated elements, each elongated element being hinged in series to a preceding elongated element and to a following elongated element, so as to form a closed series, two consecutive elongated elements forming a step of said movable stair acting respectively as tread and riser, said gymnastic machine being characterized in that at least one elongated element comprises at least one first and one second part articulated to each other.

The present invention also concerns an operating method of said gymnastic machine.

An exercise machine such as a stationary exercise bicycle includes a body supported by the ground; an axle disposed in the body; a first gear disposed on the axle; a driving shaft vertically disposed in the body; a second gear disposed on the driving shaft and meshed the first gear; and a horizontally disposed flywheel disposed in a base of the body. A rotation of the axle rotates the flywheel via the first gear, the second gear, and the driving shaft.

An exerciser, preferably in the form of a stepper with a fluid resistance system guides stepper treadles angularly downward and outward from the center of the stepper. According to an embodiment bellows that support treadles angle downward and outward.