Meet the Gravity Belt: a handy fitness tool that lets you stretch and strengthen your core, improve your posture, and increase your range of motion. It can stretch your lumbar and hip flexors and resolve back spasms. The Gravity Belt suspends your body in Neutral Posture to let your deep muscles relax to full extension.
You can use this belt with any pull up bar at the gym with the included Gravity Hook. It can handle up to 300lbs of weight.