Begin with your abs tightly braced and your ribs pulled downward. Think of using your abs to control the space between your ribs and the front of your pelvis, and don’t let them get further apart as you move.
Lower down with your weight in your heels, your feet straight forward, your knees straight over your little toes and abs braced.
Squat upward while maintaining good positioning with your knees straight forward, neutral spine, weight through heels.
Once you’re 1/4 of the way up, drop back down to the bottom before squatting all the way up.