20120122634 | EXERCISE MACHINE USING BALL - Disclosed herein is an exercise machine using a ball. The exercise machine includes a stand. A fastening bracket is secured to the stand and has on an upper portion thereof a first external threaded part. A coil spring engages at a lower portion thereof with the first external threaded part. A connecting bracket includes a second external threaded part which is provided on a lower portion thereof and engages with an upper portion of the coil spring, and a third external threaded part which is provided on an upper portion thereof. A ball includes a core and a cover formed of a plurality of panel segments. An internal bracket is secured to an inner circumferential surface of the core, and has a first internal threaded part which engages with the third external threaded part. | 05-17-2012 |