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 protective rowing device for compression of the abdomen is provided that comprises a brace and U-shaped support member that may connect to a rowing machine seat and rail.

An apparatus for exercising the muscles. The apparatus includes an exercising device having a power arm or lever, which can be equipped with actuating elements at a first end of the power arm or lever. A second end of the power arm or lever is arranged on a retaining element in a way pivotable about a pivot axis at a first articulated joint. A compression-spring element can be articulated, by way of a first end of the compression-spring element at a first point of articulation on the power arm and articulated, by way of a second end of the compression-spring element at a second point of articulation on the retaining element. A cable-pull arrangement has a cable and is fixed in a releasable manner in a spatial relationship to the exercising device, independently of the exercising device, by means of a first fixing device and is able to be combined with the power arm of the exercising device by means of a second fixing device, so that the cable-pull arrangement is connectible to the exercising device in order for training to take place.

In particular embodiments, a treadmill may comprise one or more lifting mechanisms configured to lift and lower a treadmill belt (e.g., adjust an angle of the treadmill belt relative to a support surface) by adjusting a height of the front and rear of the treadmill about a pivot point. In particular embodiments, the pivot point may be positioned somewhat centered along a length of the belt. In particular embodiments, a seesaw arrangement may provide a central pivot point, providing a moment arm to the motor while decreasing a moment arm caused by the load (e.g., a runner). In this way, an apparent load on a motor providing incline and decline to the running surface may be reduced.

A rowing exercise assembly includes a pair of elevation units that is each positionable at a selected point between a minimum elevation and a maximum elevation. A rowing machine is coupled between each of the elevation units thereby facilitating the rowing machine to be positionable at a variety of horizontal angles. In this way the elevation units enhance rowing exercises. A pair of cables is coupled to a resistance unit. A pair of handles is respectively coupled to the pair of cables and each of the handles may be gripped for performing the rowing exercises. A control is positioned proximate to the rowing machine and each of the elevation units is electrically coupled to the control. Moreover, the control actuates each of the elevation units to be positioned at the selected point between the minimum and maximum elevations.

A pilates reformer machine has a frame with a longitudinal central extruded spine (2) extending between a first support member (4a, 4b) and a second support member (6a, 6b), a carriage (8) supporting a platform (9) moveable along the spine, at least one retention spring housed within the spine and attached to the carriage, the at least one retention spring being selectively attachable to the frame by buttons (12), the carriage being provided with sides that wrap around sides of the spine and engage with an underneath of the spine, the carriage further including a plurality of wheels receivable within tracks formed within the central spine. A leg exerciser (30) and foot bar (20) may be included in the machine.

A foldable rowing machine comprises a main part, a rowing machine seat, at least one drawing stand, and at least two turning stands. A storage chamber is formed in the main part, and a pedal is hinged to an opening of the storage chamber. A rope winder for winding a rope to a required length is disposed on main part, and a damping adjustment device for realizing a damping adjustment effect by means of magnets and a metal ring is disposed at position of a damper. A whole frame can be folded to be stored, the rope can be wound by a short distance, damping force of the damper can be freely adjusted, and a movable frame for avoiding a high-low clearance is disposed on turning stands to fulfill a shock absorption effect; and various functions are realized, and user experience of the rowing machine can be effectively improved.

A system and method for providing an exercise bar for a user to use for rowing or other exercises in the water of the spa or adjacent to the spa. The exercise bar may comprise a central hub, and two sides, each with a first inner tube attached to opposing side of the central hub and a an outer tube in telescoping connection with the inner tube, and a handgrip in connection with the first outer tube. A connector may be mounted to the central hub, the connector to enable the exercise bar to be connected to one or more resistance cables. The exercise bar may be adjustable from a first, shorter length for use with exercises in which a user's hands are positioned closer together and a second, longer length for use with exercises in which a user's hands are positioned father apart.

A rowing machine exercise device includes a vertically adjustable rear support base. The vertically adjustable rear support base includes an outer vertical support beam coupled to and extending down from the rowing machine frame, where the outer vertical support beam has a vertical channel extending upward therein from a bottom of the outer vertical support beam and has a latch pin hole extending through a wall of a bottom portion of the vertical support beam; an inner vertical support beam received in a telescoping manner within the outer support beam through the bottom of the outer support beam, where the inner vertical support beam has a plurality of adjustment holes uniformly spaced along a vertical line in an outer wall of the inner vertical support beam.

A fitness exercise apparatus includes a base member, a support unit disposed on the base member, and a pivot assembly disposed on the support unit. A seat frame includes a guide rail having a front end provided with a pivot connecting member pivotally connected to the pivot assembly. The seat frame is pivotally movable to different angular positions relative to the base member. An elastic cord unit includes a plurality of first and second elastic cords connected to the support unit. A pulling unit includes two first cables connectable with the first elastic cords. An operating unit is connectable with the first cables.