Abstract: An exerciser has a base, a driving device and a supporting board. The driving device is mounted between the base and the supporting board and driving the center of the supporting board to move along a three dimensional 8-shaped track. Accordingly, an exerciser for realistic simulation of wave surfing and having a simplified structure is provided.

Abstract: An exercising device has a base, a sliding bracket and a supporting board. The base has a bottom frame, two curved rails and a guiding device. The curved rails are mounted on the bottom frame and are parallel to each other. The guiding device is mounted on the bottom frame between the curved rails. The sliding bracket is slidably mounted on the base and has a cross bar, two side frames and a driving device. The side frames are attached respectively to two ends of the cross bar and are slidably and respectively attached to the curved rails. The driving device is mounted between the side frames and the curved rails to drive the sliding bracket to slide along the curved rails. The supporting board is connected to the guiding device to make the support board being mounted on the sliding bracket in a swinging manner.

Abstract: An exerciser has a base, a driving device and a supporting board. The driving device is mounted between the base and the supporting board and driving the center of the supporting board to move along a three dimensional 8-shaped track. Accordingly, an exerciser for realistic simulation of wave surfing and having a simplified structure is provided.

Abstract: An exerciser has a base, a driving device, a supporting board and a control device. The driving device is mounted on the base and has a motor, two rotating axles, two shaking arms, two swinging shafts and two lateral arms. The motor is securely attached to the base. The rotating axles are rotatably mounted on the base and have an angle between the rotating axles to make the rotating axles to form a V-shaped arrangement on the base. The shaking arms are securely and respectively attached to the rotating axles. The swinging shafts are rotatably and respectively attached to the shaking arms. The lateral arms including a first lateral arm and a second lateral arm are respectively mounted on the swinging shafts. The supporting board is pivotally connected to the first lateral arm and is slidably connected to the second lateral arm.

Abstract: An exerciser has a base, a driving device, a supporting board and a control device. The driving device is mounted on the base and has a motor, two rotating axles, two shaking arms, two swinging shafts and two lateral arms. The motor is securely attached to the base. The rotating axles are rotatably mounted on the base and have an angle between the rotating axles to make the rotating axles to form a V-shaped arrangement on the base. The shaking arms are securely and respectively attached to the rotating axles. The swinging shafts are rotatably and respectively attached to the shaking arms. The lateral arms including a first lateral arm and a second lateral arm are respectively mounted on the swinging shafts. The supporting board is pivotally connected to the first lateral arm and is slidably connected to the second lateral arm.

Abstract: An drive assembly for an exercise bike consists of an electrical motor (10), a driven wheel (20), a unidirectional clutch (30), a flywheel (40), a shaft (47) and a crank wheel (50). The shaft (47) penetrates the driven wheel (20), the unidirectional clutch (30) and the flywheel (40). The driven wheel (20) is driven by the electrical motor (10) and then passes on the rotating momentum via the clutch (30), the flywheel (40), the belt wheel and the crank wheel (50) in sequence when the electrical motor (10) is switched on. The exercise bike can rotate in an automatic way to make the ordinary exercise bike into a physical therapy training bike.