10 Signs You Should Invest in desk foot stool

http://cashqicj059.angelfire.com/index.blog/1646596/7-trends-you-may-have-missed-about-12-foot-stand-up-paddle-board/

I bought this to put under my desk to rest my feet to support my back.. the rest slides back and forth- will not stay in place. It adds pressure to my back and makes it worse. Not a good footrest.