To execute a TRX High Pull with proper back engagement, begin by adjusting the TRX straps to a height where your arms can extend fully overhead while standing facing the anchor point. Grasp the handles with an overhand grip and walk your feet back until your body is at an angle. Initiate the movement by engaging your back muscles to pull your chest towards the handles while simultaneously driving your elbows up and back, aiming to bring your hands to your chest level. Focus on squeezing your shoulder blades together and keeping your core engaged throughout the movement, then slowly lower yourself back to the starting position with control. This exercise targets the upper back muscles, particularly the latissimus dorsi, rhomboids, and rear deltoids, while also engaging the biceps and core for stability.