A workout apparatus for use by a user to simulate core movement patterns of bike riding is provided. The workout apparatus includes a base deck, a pair of tubular members coupled to the base deck and in contact with the ground, each tubular member having a convex surface in contact with the ground surface, a frame assembly pivotably mounted to the base deck, a handle bar coupled to the frame assembly, and a pair of hydraulic damper units coupled to the frame assembly and base deck. The user on the base deck grabs the handle bar to perform a pushing or pulling motion, thereby enabling the first hydraulic damper unit or second hydraulic damper unit to provide resistance to movement of the frame assembly.

A device for an exercise apparatus includes a linear adjustment system and a sensor coupled to the linear adjustment system. The exercise apparatus includes a loading interface and a frame coupled to the loading interface for performing an exercise. The linear adjustment system fixes the loading interface of the exercise apparatus at any one of a plurality of functional positions in a functional range of the loading interface. The sensor measures the force exerted on the linear adjustment system. A correlating mechanism is used to correlate the force exerted on the linear adjustment system with the force exerted on the loading interface. The device allows exercisers to exert high or maximum loads in any one of a plurality of positions throughout their entire range of motion without first passing through a weak range of motion.

A twisting exerciser includes a base with a first shaft, a second shaft and a stop member respectively connected thereto. A first swingable unit and a second swingable unit are respectively and pviotably connected to the first and second shafts. The first swingable unit has a pad and first fan-shaped gear. The second swingable unit has a handle assembly and a second fan-shaped gear which is engaged with the first fan-shaped gear. The user holds the handle assembly, and the upper body and the lower body swing in opposite direction by the engagement between the first and second fan-shaped gears. The stop member limits the angle that the first fan-shape gears swings. The user may sits on the pad or stand on the pad to operate the twisting exerciser. The twisting exerciser is simple and safe.

Disclosed herein is a resistance exercise device and methods of using the same. In one embodiment, a resistance exercise device is disclosed comprising a quarter-wheel, a means for attaching resistance to said quarter-wheel, a support means attached to the axis of the quarter-wheel, whereby a user can perform core exercise while moving in a direction parallel to the line of resistance.

An exercise bench contains a frame (100), an overlying seat (102), a seatback (104) having a longitudinal centerline (124), a connection mechanism (106) for flexibly and/or adjustably connecting the seatback to the frame or/and the seat so that the seatback is at an adjustable angle () to the seat, and at least three pairs of symmetrically positioned handles (108L and 108R, 110L and 110R, 240L and 240R, 242L and 242R, and 250L and 250R) connected to the frame, the seat, the seatback, or/and the connection mechanism. The connection mechanism has a swivel axis (122) which extends generally parallel to the seatback's centerline and about which the connection mechanism is turnable to enable the seatback to swivel.

A pivoting abdominal exercise machine is used to exercise and strengthen core muscles. The machine includes a hinged frame, a plurality of back supports, and a base stand. The plurality of back supports is connected along the hinged frame. Together, the hinged frame and the plurality of back supports are used to interact with and brace portions of the user's back as the user performs an exercise. The plurality of back supports may either be cushioned pads or rollers. The base stand is mounted to the hinged frame through an elastic pivot resistor. The elastic pivot resistor allows the user to rock, tilt, or twist about the base stand. A frame-grasping assembly is mounted to the hinged frame. The frame-grasping assembly allows the user to hold onto the device and maintain stability while performing exercises.

An exercise machine for working core muscles includes a base, a handle bar connected to the base, and a leg support assembly connected to the base and extending substantially horizontally in a direction away from the handle bar. When one of the handle bar and leg support assembly is swung in a clockwise direction, the other of the handle bar and leg support assembly is swung in a counterclockwise direction, and when the one of handle bar and leg support assembly is swung in a counterclockwise direction, the other of the handle bar and leg support assembly is swung in a clockwise direction. The opposite direction rotations of the handle bar and leg support assembly create a double twist motion in the core muscles of a user of the machine.

An exercise apparatus with an adjustable rotating element around which a force transferring material wraps either clockwise or counterclockwise to provide bidirectional rotational resistance for exercising. The force transferring material is preferably guided to remain in close proximity to the rotating element while wrapping around the rotating element.

A resistance trainer that provides for rotational movement, balance training and strength building. The device is an integral one-piece fabricated from wood or plastic that includes a deck that is detachable from the base. The base in includes two separate dome-shaped reservoirs wherein the domes provide instability when in contact with the ground due to the curved surface. Inside of the domed reservoirs is space to add a weighted component, such as standard plate weights or sand or water or other replaceable means of weighting the device. The user can rotate the board using the torso muscles used when surfing or snowboarding and can also balance in a heel to toe direction or a front to back direction for balance and strength building.

Disclosed herein is a resistance exercise device and methods of using the same. In one embodiment, a resistance exercise device is disclosed comprising a quarter-wheel, a means for attaching resistance to said quarter-wheel, a support means attached to the axis of the quarter-wheel, whereby a user can perform core exercise while moving in a direction parallel to the line of resistance.