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

Claim 14:
15. 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, and a compression adjustment handle threaded onto the axle shaft and abutting the compressible spring, 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) gripping the left handle form and the right handle form and twisting the forms in opposite direction;
(c) determining if the level of force resistance set by the adjustment handle is correct for the exercise;
(d) if the level of force resistance set in (c) is not correct, advancing or retarding the compression adjustment handle and repeating step (b); and
(e) if the level of force resistance set in (c) or corrected in (d) is correct, repeating step (b) for a number of repetitions.