Auxiliary device for exercising abdominal muscles

Abstract

There is provided an auxiliary device for abdominal muscle exercise, and more particularly, to an auxiliary device for abdominal muscle exercise having a simple shape in which two supports are connected to each other by a board for easily exercising and strengthening the body. To achieve the objects of the present invention, the auxiliary device for abdominal muscle exercise comprises: a first support ( 3 ) being of a predetermined height and size sufficient to support the sacral region just beneath the lumbar region in use; a board ( 5 ) secured to and extending from the bottom surface of the first support ( 3 ); and a second support ( 7 ) secured to and positioned on the end of the board ( 5 ) opposite to the first support ( 3 ). Preferably, the width of the board ( 5 ) [the shortest distance between the first support ( 3 ) and the second support ( 7 )] and the height and inclination of the second support ( 7 ) may be formed to support the lesser trochanter region of the femur. The second support ( 7 ) may be connected with adjusting means ( 77 ) to adjust the width of the board ( 5 ).

1 . An auxiliary device for abdominal muscle exercise comprising:
 a first support ( 3 ) being of a predetermined height and size sufficient to support only the sacral region just beneath the lumbar region in use; and   a board ( 5 ) secured to and extending from the bottom surface of the first support ( 3 ),   wherein the material of the board ( 5 ) is flexible to permit use of the device on an uneven surface or even surface.   
     
     
         2 . An auxiliary device for abdominal muscle exercise comprising:
 a first support ( 3 ) being of a predetermined height and size sufficient to support the sacral region just beneath the lumbar region in use;   a board ( 5 ) secured to and extending from the bottom surface of the first support ( 3 ); and   a second support ( 7 ) secured to and positioned on the end of the board ( 5 ) opposite to the first support ( 3 ),   wherein the size of the board ( 5 ) and the height and inclination of the second support ( 7 ) are formed to support the lesser trochanter region of the femur in use.   
     
     
         3 . The auxiliary device for abdominal muscle exercise according to  claim 2 , wherein the second support ( 7 ) is connected with adjusting means ( 77 ) to adjust the width of the board ( 5 ). 
     
     
         4 . The auxiliary device for abdominal muscle exercise according to  claim 2 , wherein the first support ( 3 ), the board ( 5 ) and the second support ( 7 ) include a cushioning material for their respective parts touching a human body. 
     
     
         5 . The auxiliary device for abdominal muscle exercise according to  claim 2 , wherein the first support ( 3 ), the board ( 5 ) and the second support ( 7 ) are integrally formed, using reinforced plastics (fiber reinforced plastics, FRP) having elasticity. 
     
     
         6 . The auxiliary device for abdominal muscle exercise according to  claim 2 , wherein the height of the first support ( 3 ) is 7˜14 cm from the surface of the board ( 5 ), the height of the second support ( 7 ) is 5˜9 cm from the surface of the board ( 5 ), and the width of the board ( 5 ) [the shortest distance between the first support ( 3 ) and the second support ( 7 )] is adjustable within the range of 7˜15 cm. 
     
     
         7 . The auxiliary device for abdominal muscle exercise according to  claim 3 , wherein the first support ( 3 ), the board ( 5 ) and the second support ( 7 ) include a cushioning material for their respective parts touching a human body.