Patent ID: 11857820
Assignee: nan
Field: Furniture, games (Other fields)
Classification: CPC A | IPC A

Claim 19:
20. A method for exercising one or more muscle groups using an isometric exercise tool, the isometric exercise tool having a left handle form interfaced to a right handle form over an axle shaft locked to the right handle form, the axle shaft supporting a pressure plate, a compressible spring or set of springs, and a compression adjustment handle threaded onto the axle shaft and abutting the compressible spring or spring set, the pressure plate adjacent in assembly to a friction-resistive material fixed on the left handle form, the left handle form including a piston form interfacing with a ring housing on the right handle form, the piston form adjacent in assembly to a friction-resistive material fixed on the right handle form comprising:
(a) turning the compression adjustment handle to advance the handle along threads of the axle shaft, the compression handle compressing the spring or spring set to compress the pressure plate and piston form in tandem against the friction resistive materials;
(b) determining if the level of force resistance set by the adjustment handle is correct for the exercise by visualizing a linear gauge of equally spaced grooves provided about a stem of the adjustment handle the grooves subsequently aligning with the end of the right handle form while advancing the adjustment handle over the threads on the axle shaft to increase compression force and therefore force resistance of the exercise tool;
(c) gripping the left handle form and the right handle form and twisting the forms in opposite direction.