Check out this Kansas City inventor's space-age fitness equipment

Paul Francis developed his SpiraFlex technology that helped astronauts combat muscle and bone loss in space. His new product, the DoubleFlex Portable Gym, uses the same technology to take the weight out of lifting weights.
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Paul Francis developed his SpiraFlex technology that helped astronauts combat muscle and bone loss in space. His new product, the DoubleFlex Portable Gym, uses the same technology to take the weight out of lifting weights.