Exercise apparatus for strengthening abdominal muscles

  • US 9,017,237 B2
  • Filed: 09/13/2010
  • Issued: 04/28/2015
  • Est. Priority Date: 01/01/2006
  • Status: Active Grant
First Claim
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1. An exercise device to assist a person in the performance of abdominal crunches and exercises, wherein said person has buttocks, a back, legs, and feet, said exercise device comprising:

  • a) a first member comprising a padded top surface having a top length and width, a bottom surface having a bottom length and width, and a plurality of edge surfaces each having a height that is the same on every edge, wherein;

    the entire top surface is essentially parallel to the bottom surface;

    all of the plurality of edge surfaces are not parallel to the bottom surface;

    the heights of the plurality of edge surfaces are not parallel to the lengths or widths of the top and bottom surfaces;

    the length of the top surface is approximately equal to the length of the bottom surface;

    the width of the top surface is approximately equal to the width of the bottom surface;

    the lengths of the top and bottom surfaces are substantially larger than the heights of the plurality of edge surfaces; and

    ,the entire bottom surface is essentially planar;

    b) wherein the padded top surface supports the person'"'"'s buttocks when he is seated thereon;

    c) a second member that supports the person'"'"'s back, wherein the second member is hinged only to the first member, and further comprises a plurality of support pads;

    d) at least one removable and replaceable spring having elasticity, which is attached only to said first and second members;

    that when a force is exerted upon the second member by the person sitting or lying on the exercise device, where said force tends to move the second member towards a position parallel to the first member or towards a position on the same plane as the first member, the at least one removable and replaceable spring provides resistance to said force, andthat when the person is not sitting or lying on the exercise device or does not exert a force, said at least one removable and replaceable spring provides a force that maintains the second member in a position not parallel to the first member and not in the same plane as the first member;

    wherein the elasticity of the at least one removable and replaceable spring is selectable so as to provide variable back support; and

    ,e. at least one removable footrest that is slidably variably positionable in a direction parallel to the top length of the top surface of the first member to allow the person to stretch his legs and rest his feet comfortably on the at least one removable footrest.

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