A reciprocating unidirectional electromagnetic resistance device includes a shaft having a flywheel installed to a first end of the shaft, an electromagnetic braking unit, and a first sensing device. A spring return device and a second sensing device are installed at a second end of the shaft, and a pull rope device is installed at the middle of the shaft. The electromagnetic braking unit and the spring return device are integrated into a single module and provided for an operator to perform a reciprocating motion to pull out a pull rope of the pull rope device and drive the shaft, the flywheel and the spring return device synchronously, and the electromagnetic braking unit acts an electromagnetic resistance onto the flywheel, so that the flywheel has the excellent precise resistance of the electromagnetic braking unit. When released, the pull rope can be retracted to achieve the reciprocating motion effect.

Rowing machines are described that permit a rower to adjust the rowing resistance using a gear shift mechanism. The rowing machine includes a handle connected to a chain, which passes, sequentially, over a derailleur and then to the gears of the gear cassette. The gear cassette is coupled to a resistance unit, which may be similar to resistance units used in off wheel bicycle trainers. This configuration of derailleur and gear cassette permit the rower to smoothly select a gear.

A rally fitness equipment includes a pedal body having a base and a cover covering the base, a resistance device including a control unit and a rotatable transmission unit arranged adjacent to each other, a winding unit, which is mounted in an accommodating space in the pedal body and includes a first belt wheel and a second belt wheel with mutually spaced settings, and a pull rope set including a pull rope that has one section thereof wound around the first belt wheel and the other section thereof exposed outside the cover of the pedal body and a bungee rope that has one section thereof wound around the second belt wheel and the other section thereof fixed to the base of the pedal body. The control unit provides a resistance against rotation to the transmission unit.

A rowing machine includes a handle having a first portion and a second portion that are selectively connectable. The rowing machine includes a flywheel driven by two separate cables. A first cable is connected to the first portion of the handle and a second cable is connected to the second portion. A spreader extends the width between the first portion and the second portion, allowing a user to perform kayak and canoeing exercises.

A driving and resistance control system for a permanent-magnet synchronous motor is disclosed. A control device includes a processing unit, a motor driving circuit, a resistance controller, and an interlock switch. In a first operation mode, the interlock switch makes the motor driving circuit and the permanent-magnet synchronous motor open-circuiting, and connecting stator windings of the permanent-magnet synchronous motor to the resistance controller, and under this condition, the external rotor of the permanent-magnet synchronous motor is rotated by spinning of a flywheel, so that the permanent-magnet synchronous motor is operating in a generator mode to generate a resisting force to the flywheel by mesas of a resistance generation device. In a second operation mode, the interlock switch makes the motor driving circuit and the permanent-magnet synchronous motor closed-circuiting and cutting off control of the resistance controller, and electrical energy is supplied from the power supply circuit to the permanent-magnet synchronous motor, so as to make the permanent-magnet synchronous motor operating in a motor mode to induce an acceleration on the external rotor.

A cycling device used for exercise and/or rehabilitation includes a shaft for grasping by a user, a foot assembly coupled to the shaft and configured to be supported on a surface, and a pedal assembly coupled between the shaft and the foot assembly. The cycling device is intended to be used by a seated user.

A portable elliptical exercise apparatus where movement of the right pedal or left pedal defines an ellipse having an ellipse width and ellipse height, where the ellipse height can be incrementally varied according to the pedal surface location of a left foot or right foot on a corresponding left pedal or right pedal.

An exercise machine has a flywheel, a rotary input member, and a clutch mechanism that is positionable in a freewheel position in which rotation of the rotary input member causes rotation of the flywheel and wherein thereafter ceasing rotation of the rotary input member permits continued rotation of the flywheel. The clutch mechanism is alternately positionable in a direct drive position in which rotation of the rotary input member causes rotation of the flywheel and wherein thereafter ceasing rotation of the rotary input member prevents continued rotation of the flywheel. Advantageously, movement of the clutch mechanism from the freewheel position to the direct drive position is prevented when rotation of the rotary input member is out of synchronization with rotation of the flywheel.

An indoor exercise bicycle having a magnetic brake. The magnetic brake system has a pair of parallel arms each having a set of magnets. The pair of parallel arms moves along a track in a radial direction relative to the axis of the flywheel. The pair of parallel arms move toward and away from the flywheel not via a pivoting action. Instead, the pair of parallel arms moves linearly towards and away from the flywheel.

Systems and methods for adjusting resistance on an exercise cycle having a frame and a flywheel include calibration, homing and auto-follow routines. A resistance apparatus comprising an actuator is configured to selectively position the resistance apparatus relative to the flywheel, wherein a distance between the resistance apparatus to the flywheel corresponds to resistance applied to the flywheel. Control components are configured to control operation of the resistance system in response to instructions, and a computing device is configured to output media for an exercise class to a user, the exercise class comprising one or more target resistance ranges corresponding to a segment of the exercise class. The computing device is further configured to selectively implement auto-follow logic configured to determine a target resistance value for a current segment of the exercise class and instruct the control components to adjust the resistance system to the target resistance value.