The TRX Hinge is an intense and unique exercise for challenging the anterior core and for teaching separation of hip and spine movement. Your TRX should be adjusted to mid length, with your shins in a vertical position and your feet shoulder-width apart. Drive your hips forward and roll-out into a plank position with your hands out in front of you. Keep your core braced throughout the full range of motion.
Your hips should initiate your return as though there were a string tied around your waist to pull you back to the start position. This return will most likely be more of a challenge than the roll-out, so make sure you save some gas in the tank to bring you back home.