The present invention relates to a chest expander, wherein the chest expander includes a pair of operating arms that are connected by a rotating shaft to approach or be spaced apart from each other, a plurality of elastic force adjusting holes formed as through holes in a longitudinal direction of the operating arm, elastic members that are disposed between the operating arms to cross and configured to provide an elastic force in a direction in which the operating arms are spaced apart from each other when the operating arms approach each other, and elastic force adjusting parts that allow one end portions of the elastic members to move along the elastic force adjusting holes and to be fixed so that lengths of the elastic members between the operating arms are changed so as to adjust strength levels of the elastic forces of the elastic members.

Provided herein is a dynamic device that can provide lateral rocking with fore-aft action to a stationary bicycle trainer. Also provided herein is a dynamic device, which can include a four-bar linkage mechanism that can provide a stationary trainer or stationary bicycle with an intuitive and natural-feel lateral rocking action and fore-aft action to simulate motions of a bicycle being ridden in a non-stationary environment.

An exercise and rehabilitation bar including a flexing bar, at least one resistance insert, and at least one handle. The flexing bar has a first end, a second end, and a cavity running from the first end to the second end. The at least one resistance insert is removably carried within the cavity of the flexing bar and the at least one handle is removably securable to either the first or second end of the flexing bar.

An exercise and rehabilitation bar including a flexing bar, at least one resistance insert, and at least one handle. The flexing bar has a first end, a second end, and a cavity running from the first end to the second end. The at least one resistance insert is removably carried within the cavity of the flexing bar and the at least one handle is removably securable to either the first or second end of the flexing bar.

A walker device is described herein including two side frames, each side frame including a front vertical support, a rear vertical support and at least one connecting member extending between the front and rear vertical supports. The walker device further includes a cross bar extending between the two side frames and pivotally connecting to the front vertical supports of the two side frames. The walker device also includes a tension device which applies a resistive force to the pivoting motion between the first cross bar and the two side frames. The walker device is therefore capable of a pivoting configuration which enables the user to learn or re-learn a more natural gait pattern including rotation of the upper and lower body. Some embodiments of the walker device include a second, auxiliary cross bar that is parallel to the first cross bar and horizontally offset from the first cross bar.

A walker device is described herein including two side frames, each side frame including a front vertical support, a rear vertical support and at least one connecting member extending between the front and rear vertical supports. The walker device further includes a cross bar extending between the two side frames and pivotally connecting to the front vertical supports of the two side frames. The walker device also includes a tension device which applies a resistive force to the pivoting motion between the first cross bar and the two side frames. The walker device is therefore capable of a pivoting configuration which enables the user to learn or re-learn a more natural gait pattern including rotation of the upper and lower body. Some embodiments of the walker device include a second, auxiliary cross bar that is parallel to the first cross bar and horizontally offset from the first cross bar.

A training device is provided for training a foot using the device. The training device includes a fulcrum placed at a center and four projections that project in different directions from the fulcrum. Each of the four projections have elastic members that are bendable. The training device is configured to improve foot muscle strength by bending and stretching the elastic members. At least two of the four projections have different degrees of elasticity in flexure as determined when a force is applied to a distal end of each of the at least two projections to bend the elastic members. The four projections project in cross directions from the fulcrum at the center. Each pair of projections that oppose each other across the fulcrum are arranged on a straight line.

A torsion bar resistance unit and a variable resistance unit system having at least one selectably engageable torsion bar is disclosed. A resistance training machine having a plurality of selectably engageable torsion bars coupled to a lever is disclosed wherein a rotational resistance load is based on which of the plurality of torsion bars are rotatably locked and the force applied to the lever. Also disclosed is a user interface that allows a user to selectively engage any of the plurality of torsion bars, output the total resistance load and the translation distance on an output screen.