A seat assembly for adjustably connecting a seat to a seat post is provided. The seat assembly may include a slider configured to slide along the seat post, a cam coupled to the slider and movable between a first position and a second position, and a cam washer positioned between the cam and the slider. The cam washer may include a base seated within a cutout disposed in the slider, the base having a non-circular shape for engagement with a complementary shape of the cutout. The cam washer may include a tab extending from the base, the tab seated within the cam. Associated systems and methods are also provided.

A stationary exercise equipment resistance regulation device includes a stator holder, an axle, a circuit board, at least one magnetism detection element, a rotary knob, and at least one magnet. When the rotary knob is operated to rotate, a distance between a magnet and the magnetism detection element is changed so as to vary a magnetic force detected by the magnetism detection element to thereby change a magnitude of an induced voltage or generate a rotation turn signal. Based on the induced voltage or the rotation turn signal, a signal processing device identifies a resisting force level and calculates data of one of a resisting force magnitude and wattage that the resistance device applies to the stationary exercise equipment.

A control system for a movement reconstruction and/or restoration system for a patient, comprising at least one sensor, at least one controller, at least one programmer, at least one stimulation system,
wherein the controller is connected with the sensor, the programmer and the stimulation system,
wherein the sensor is part of or attached to a training entity in order to create and/or guide a movement model for a patient and/or adjust stimulation settings based on sensor input.

A control system for a movement reconstruction and/or restoration system for a patient, comprising at least one sensor, at least one controller, at least one programmer, at least one stimulation system,
wherein the controller is connected with the sensor, the programmer and the stimulation system,
wherein the sensor is part of or attached to a training entity in order to create and/or guide a movement model for a patient and/or adjust stimulation settings based on sensor input.

An exercise machine may include a reciprocating linkage that supports one or more pedals configured to move in a closed loop (e.g., elliptical) path as a user exercises with the machine. The exercise machine may be adjustable to vary a characteristic of the exercise provided by the machine, for example by changing an incline of a rail supporting the reciprocating linkage, and thus an angle of the closed loop path. The exercise machine may vary the incline with a lift mechanism operatively associated with the front upright frame of the machine, which may also support a resistance assembly, all in a compact form factor that may be more aesthetically pleasing and practical for relatively smaller exercise spaces.

An apparatus for natural torso and limbs tracking and feedback for electronic interaction with fall safety support. The apparatus comprises a body harness worn on the body of a user, a support structure designed to bear the weight of the user in the event of a stumble, trip, or fall, and a plurality of tethers attached at one end to the harness and at the other end to the support structure. One or more sensors are integrated into the system to measure aspects of the user's movement and used as input to control a computer system. In the event of stumble, trip, or fall, all of, or a portion of, the user's body weight is borne by the tethers as a safety mechanism to prevent injury. The system is designed to be used with virtual reality systems wherein the user's vision is blocked or obscured by a virtual reality visor.

An apparatus for natural torso and limbs tracking and feedback for electronic interaction with fall safety support. The apparatus comprises a body harness worn on the body of a user, a support structure designed to bear the weight of the user in the event of a stumble, trip, or fall, and a plurality of tethers attached at one end to the harness and at the other end to the support structure. One or more sensors are integrated into the system to measure aspects of the user's movement and used as input to control a computer system. In the event of stumble, trip, or fall, all of, or a portion of, the user's body weight is borne by the tethers as a safety mechanism to prevent injury. The system is designed to be used with virtual reality systems wherein the user's vision is blocked or obscured by a virtual reality visor.

A replacement bicycle stem is disclosed herein. In particular, prior to operation of a bicycle in a stationary environment, the bicycle stem, if present, is removed and replaced with the replacement bicycle stem disclosed herein. The replacement bicycle stem is intended to rotate or turn with the handlebars, but independent of the steer tube and front wheel. More specifically, the replacement stem includes a main body with a mounting channel at one end and a handlebar clamp at another end. At least one bearing is disposed within a portion of the mounting channel for engagement against the steer tube. The at least one bearing allows or facilitates rotation of the stem about the steer axis independent of or substantially independent of the steer tube.

A pedal exerciser includes a worm shaft meshed with a worm wheel. A crank drives rotation of the worm wheel through two pedals. A rotary disc assembly is journaled to and rotatable with the worm shaft. The rotary disc assembly has a conductive member that is non-magnetizable and that is rotatable around an axis of the worm shaft. A magnetic assembly is disposed near the conductive member and has a magnet facing the conductive member. The magnet produces a drag force to resist an exercising force when the conductive member is rotated to move past the magnet. An adjustment assembly moves the magnetic assembly toward or away from the rotary disc assembly to vary the magnitude of the drag force.

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.