Medi-Dyne CoreStretch Core Body Exerciser
Finally, an effective stretching device for your back, shoulders, hips, hamstrings and shins. CoreStretch's unique design elongates the back, stretching the muscles, tendons and ligaments not only in the back, but also those in your legs that work in conjunction with the back.  CoreStretch is also light and collapsible making it easy to use anywhere you go.