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.

Disclosed is an exercise device having a platform and a roller. The platform has a surface sized and shaped to support a body part of a user and a pair of handles. The roller is coupled to the platform and configured to rotate relative to the platform. The platform is configured to translate in a first direction when the roller rotates in a first direction of rotation and translate in a second direction when the roller rotates in a second direction of rotation.

Disclosed is an exercise device having a platform and a roller. The platform has a surface sized and shaped to support a body part of a user and a pair of handles. The roller is coupled to the platform and configured to rotate relative to the platform. The platform is configured to translate in a first direction when the roller rotates in a first direction of rotation and translate in a second direction when the roller rotates in a second direction of rotation.

An exercise device is described which includes a platform having a first end and a second end opposite the first end; first and second wheels, wherein the first wheel is positioned proximate the first end and the second wheel is positioned proximate the second end and the first and second wheels are configured to roll across a surface as the exercise device is displaced along the surface; a first motor configured to apply a first torque to the first wheel where the magnitude of the first torque is related to the distance of the exercise device from a zero position and the direction of the first torque urges movement of the exercise device toward the zero position. Versions are also described with more wheels and more motors.

An exercise device is described which includes a platform having a first end and a second end opposite the first end; first and second wheels, wherein the first wheel is positioned proximate the first end and the second wheel is positioned proximate the second end and the first and second wheels are configured to roll across a surface as the exercise device is displaced along the surface; a first motor configured to apply a first torque to the first wheel where the magnitude of the first torque is related to the distance of the exercise device from a zero position and the direction of the first torque urges movement of the exercise device toward the zero position. Versions are also described with more wheels and more motors.

An exercise device with a base on a support surface and a user platform. One end of a support post is axially mounted to the base and the other end is pivotally mounted to the platform. The platform pivots with the post in a horizontal plane parallel to the support surface and pivots in a vertical plane perpendicular to the support surface. A resistance element having one end mounted to the support post and the other end to the base is provided to control the velocity and angle of pivot of the platform in the horizontal plane. A resistance element having one end mounted to the base and the other end to platform to control the velocity and angle of pivot of the platform in the vertical plane. The user stands on the platform and performs exercise motions to propel the platform in the horizontal plane and the vertical plane.

An exercise device with a base on a support surface and a user platform. One end of a support post is axially mounted to the base and the other end is pivotally mounted to the platform. The platform pivots with the post in a horizontal plane parallel to the support surface and pivots in a vertical plane perpendicular to the support surface. A resistance element having one end mounted to the support post and the other end to the base is provided to control the velocity and angle of pivot of the platform in the horizontal plane. A resistance element having one end mounted to the base and the other end to platform to control the velocity and angle of pivot of the platform in the vertical plane. The user stands on the platform and performs exercise motions to propel the platform in the horizontal plane and the vertical plane.

In one embodiment, a kinetic shape is designed by determining an applied force to be applied to an object that is to incorporate the kinetic shape, determining a reactive force that is desired to be produced in response to the applied force, inputting the applied force and the reactive force into a kinetic shape equation, and solving the equation to obtain the kinetic shape.

[Problem to be Solved] Provided is an exercise apparatus which can suppress positional displacement when a user is jiggling. [Solution] The exercise apparatus 1 includes: a main body part 5 which has a placement part (smooth surface 5a), on which both legs of a user are placed, and an arc part 5b (curved surface) and rotationally moves over a predetermined range by alternate movement of the legs of the user placed on the placement part; and restraining means which restrains movement of the main body part 5 within a horizontal plane. The restraining means has a groove part 5c which is formed by removing a portion of the arc part 5b of the main body part 5 and a columnar body 3 which is fitted into the groove part 5c.

[Problem to be Solved] Provided is an exercise apparatus which can suppress positional displacement when a user is jiggling. [Solution] The exercise apparatus 1 includes: a main body part 5 which has a placement part (smooth surface 5a), on which both legs of a user are placed, and an arc part 5b (curved surface) and rotationally moves over a predetermined range by alternate movement of the legs of the user placed on the placement part; and restraining means which restrains movement of the main body part 5 within a horizontal plane. The restraining means has a groove part 5c which is formed by removing a portion of the arc part 5b of the main body part 5 and a columnar body 3 which is fitted into the groove part 5c.