Develop the core, proprioception, and kinesthetic awareness. Injection-molded plastic platform with a textured nonslip surface and 8 notches to accommodate resistance tubing. Perform standing, seated, or lying exercises and incorporate medicine balls, weighted bars, or dumbbells to enhance the overall workout. Raised handholds on each side of the top allow for multiple push-up positions. Steel X-shaped base provides stable support. A simple pull of the pop-pin and rotation of the base allows for several levels of instability to fit most users.