A crank for fitness equipment with a self-locking mechanism is provided. A crank body is provided with an installation hole, an internal thread is disposed in the installation hole, and an anti-loosening ring embedding portion is disposed at an outer end of the installation hole. An anti-loosening ring is tightly fitted to the anti-loosening ring embedding portion. A screw rod of a pedal is screwed into the installation hole of the crank body, and passes through the anti-loosening ring tightly fitted in the installation hole.

An exercise device includes a motor connected to a drive chain of the exercise device. The motor applies a torque in the direction of an input torque, thereby lowering the input torque applied by the user to rotate the drive chain. The motor is controlled to simulate exercise conditions of a mobile exercise device.

Disclosed is a fitness equipment provided with massage pedals, comprising a frame, two pedals, two rotating shafts, two flywheel swing arms, a flywheel, a damping wheel and a belt; the pedals are mounted on the frame and provided thereon with massage mechanisms; the pedals are connected to the rotating shafts; an inner end of the rotating shafts is rotatably connected to an outer end of the flywheel swing arm; a middle portion of the flywheel swing arm is sleeved on an outer end of a flywheel axle; the flywheel axle penetrates the flywheel, a middle portion of the flywheel axle and the damping wheel are rotatably mounted to the frame; and the belt is wound on the damping wheel and the flywheel.

A fan bike providing magnetically controlled resistance, having a fan wheel and a micro adjustment assembly mounted on a bike frame; the fan wheel is rotationally mounted on the bike frame, and one side of which is given an iron ring and an aluminum ring. The micro adjustment assembly has a fixed seat inside the bike frame, a movable seat slidably mounted in the fixed seat, at least one magnet on the movable seat facing to the aluminum ring, an adjustment handle outside the bike frame, and a pulling wire connected between the movable seat and the adjustment handle. The magnetically controlled resistance provided by the fan bike is adjustable.

A system, method and apparatus for exercise and rehabilitation includes a frame coupled to a base and having a top end. An arm having a proximal end can be coupled to the top end of the frame. A distal end of the arm is opposite the proximal end. The arm is movable in a first degree of freedom between a retracted position and an extended position relative to the frame. Handles are coupled to the arm adjacent the distal end and movable in a second degree of freedom relative to the arm. The handles are manipulated by a user for exercise and rehabilitation.

An inner assembly and an outer assembly of a hypotrochoid apparatus with a spindle located inside the inner assembly where a spindle proximate end and a spindle distal end each employ at least one mechanical interface. An eccentric hub provides a central throughbore for receiving a spindle, where the spindle is rotatably engaged with the eccentric hub and the inner bore which enhances vibration when the spindle is rotating and the eccentric hub is engaged.

Embodiments herein are directed to an aquatic exercising assembly. The aquatic exercising assembly includes a container having a liquid retention portion. The liquid retention portion includes a bottom wall, a pair of opposing sidewalls, and a pair of opposing end walls, a pedal assembly and a paddle assembly. The pedal assembly is rotatably coupled to the one of the pair of opposing end walls. The paddle assembly is coupled to each one of the pair of opposing sidewalls. The paddle assembly is movable between a rearward position and a forward position in a longitudinal direction. The pedal assembly is rotatably moved by a lower body movement of a user and the paddle assembly is moved by an upper body movement of the user.

Embodiments herein are directed to an aquatic exercising assembly. The aquatic exercising assembly includes a container having a liquid retention portion. The liquid retention portion includes a bottom wall, a pair of opposing sidewalls, and a pair of opposing end walls, a pedal assembly and a paddle assembly. The pedal assembly is rotatably coupled to the one of the pair of opposing end walls. The paddle assembly is coupled to each one of the pair of opposing sidewalls. The paddle assembly is movable between a rearward position and a forward position in a longitudinal direction. The pedal assembly is rotatably moved by a lower body movement of a user and the paddle assembly is moved by an upper body movement of the user.

An exercise system includes two or more exercise machines coupled together. Each exercise machine can include a modular exercise machine offering one or more unique exercise functions. To vary or change the exercise system, the exercise machines may decouple from each other and couple to a different exercise machine. Examples of the exercise machines include osteogenic, muscular hypertrophy and cardiovascular devices. These exercise systems enable modifications to the exercise machines for user rehabilitation. The exercise machines can monitor other exercise machines and provide feedback to a user through a computer display.

A method of calibrating a crank arm-mounted power meter includes receiving an angle measurement from a first sensor disposed on a crank arm, the angle measurement corresponding to an angular orientation of the crank arm. A predicted load measurement is then calculated based on the angle measurement and weight data for the crank assembly including the crank arm and stored in memory. A load measurement corresponding to a load on the crank arm is obtained and a zero offset value is then calculated by determining a difference between the predicted load measurement and the load measurement. Power calculation logic for determining power applied to the crank arm is then updated using the zero offset value.