Feet wider than shoulder width apart
Core tight through a full exhale, half an inhale
Sternum lifted, with shoulders pulled back and down
Flare your knees as you reach back with your hips to feel a stretch in your hamstrings
Once you cannot lower any further, consciously squeeze your glutes as you drive your upper back into the bar
If you do not actively flare your knees during this movement, you will lose a significant amount of range of motion as well as implicating your lower back during the movement.