Come into a tall kneeling position on a mat with your hands on your hips. Keeping your core engaged and a flat back, with control slowly lower back towards your feet. Aim to keep an unbroken, straight line between your knees and your head. When you can not lower further without breaking this position, engage your quads & glutes and drive forwards - keeping that neutral position throughout until you return to the start position. Repeat for the required amount of reps (or time).