Howdy All,
I use an exersize wheel. It's a 6" diameter wheel with handles on each side. The basic exersize is this. You get on your knees, grab the handles and roll out as far as you can then roll back. Do it about 10 times and STOP. Takes less than 5 minutes a day. You will streghthen the stomach muscles which will help the back.

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Frank X. Morris
17 Kia Niro
08 Jeep Wrangler 4 door unlimited