Step 1: Position yourself by standing upright facing the TRX anchor. The TRX straps are set to hip level, and your foot stance is staggered, with the front foot flat on the floor, and on the ball of the back foot. You are holding the TRX handles by your sides.
Step 2: Proceed by leaning back. As you are leaning back, your weight is transferring to the back foot. Your back foot is now flat on the floor, and your front foot is on the heel only.
Step 3: At the same time, you are allowing the extended arms to rise up in front of you, all the while bracing at the shoulders to keep the shoulder girdle muscle engaged.
Step4: rhomboids to return back up to the starting position, you are simultaneously pushing your arms downward towards your sides, as your transfer your weight back to the front foot, placing the foot flat on the floor again; make sure to retract the shoulder blades to help engage the back muscles.
Step 5: Repeat this movement several times before switching legs, to ensure the balance of usage between both legs.
How to progress the exercise
Due to your arms being outstretched during this exercise, any slight change in angle will create sufficient change in overload to the muscles, so the best progression for this movement is to lower yourself by several degrees towards the floor. Lower yourself slightly more as needed.
Be mindful of your exercise form, as it is easy to compensate with the bigger lat muscles, or by thrusting your hips forward for momentum.