TECHNIQUE: Position yourself directly below the straps. Place your heels onto a box. Pull yourself up off the ground and activate the core. Engage the hamstrings as you pull yourself towards the box in a controlled manner ADVANTAGES: This is A great way to strengthen and work your hamstrings while challenging your core FAULTS: The most common fault is collapsing in the midsection (letting the core disengage) and dead hanging by not being active in the shoulders. SCALING: This move is an advance maneuver. If you need to scale it down look at the TRX hamstring curl, or Hip Rise.