An elliptic-orbit treadmill has a front-end drive portion and a middle drive portion configured on the front end of the pedal, the middle drive portion being pivotally linked to the bottom end of the handle bar on the same side. Each transmission bar set includes a transverse connecting rod and a vertical connecting rod pivotally connected to each other in an elbow style, the rear end of the transverse connecting rod being pivotally connected to the middle section of the handle bar on the same side, while the bottom end of the vertical connecting rod being pivotally connected to the front-end drive portion of the pedal on the same side. The crank provided on the transverse driven shaft at the center of the flywheel is pivotally connected to the middle section of the transverse connecting rod provided on the transmission bar set on the same side.

An exercise device comprises a frame, two first swing arms, two second swing arms, two pedals, a resistance device, two cranks, two link rods, a lever bracket, two rock rods, and an adjusting device. Each first swing arm has a first end coupling with the frame and a second end coupling with a first end of one second swing arm, which has a second end coupling with one pedal. Each crank has a first end coupling with the resistance device and a second end coupling with a first end of one link rod, which has a second end coupling with one second swing arm. The lever bracket pivotally couples with the frame and has two fulcrums. Each rock rod has a first end coupling with one fulcrum and a second end coupling with one second swing arm. The adjusting device adjusts the distance between the fulcrums and an axle.

A pedal assembly for electromechanical exercise or rehabilitation of a user is disclosed and can include pedals to engage appendages of a user. A spindle supports each pedal and has a spindle axis. A pedal arm assembly is located between the spindle and an axle. The pedal arm assembly is radially offset from the spindle axis to define a range of adjustability for the pedal relative to the axle. The pedal arm assembly can include an electrically-actuated coupling assembly to adjust the position of the pedal in response to a control signal, and regulate motion of the user engaged with the pedals.

Disclosed are an anti-static bearing assembly and an elliptical machine. The anti-static bearing assembly includes a bearing seat, a bearing mechanism, and a conductive part, where an accommodating slot hole is provided in one side of the bearing seat, the bearing mechanism includes a bearing inner ring and a bearing outer ring, the bearing outer ring is connected to the bearing seat, a guide hole is provided in the bearing seat, a placement slot is provided in the bearing seat, a first end of the conductive part is inserted into the guide hole and is in conductive contact with the bearing mechanism, and a second end of the conductive part is placed in the placement slot and at least partially protrudes from an outer circumferential side of the bearing seat, such that the second end of the conductive part can be in conductive contact with the armrest swing rod.