Hack squat
KEY COACHING POINTS:
Keep your shoulder blades pinned back
Feet should be just wider than shoulder width apart and a bit forward
Brace your core
Descend by letting your knees track towards your toes (knees should not track inwards)
Squat as low as you can whilst maintaining a neutral spine
Press up and lock your hips out at the top of the movement to achieve a full contraction of the glutes