Start with your feet together. Balance on your working leg, knee slightly bent.
Begin to hinge at the hips. Maintain a neutral back, and keep the hips and shoulders square throughout the movement.
Descend deeper into the hinge, by driving the working leg into the floor, and allow the knee to bend more. Stay engaged, push the hips back, and extend the straight leg out behind you.
Pause when your torso reaches parallel. Then, exhaling, press hard into the ground and return to the standing position. Fully extending the hips and squeezing your glutes at the top.
Pause and repeat for repetitions.