Step 1: Standing upright on one foot, facing the TRX anchor, with the other foot held up several inches in front of you, hold the TRX handles and squat down with the supporting leg as deeply as you can.
Step 2: Press through the heel of the squatting leg to push yourself up back to the starting position.
Step 3: Repeat this movement several times, before switching legs and repeating the same thing.
How to progress the exercise
To progress this exercise, you can begin to straighten out your legs, in order to make the working lever longer, which will put more stress on the working abdominals. Placing your hands on a stability ball or BOSU will add more intensity to your core!
This is an exercise where momentum can easily enter into play. Be mindful of keeping the abdominal muscles engaged throughout the whole movement in order to keep momentum to a minimum. Also, avoiding too much shifting of the body from side to side will keep the stress on the working muscles in order to get the maximum benefit from this exercise.