Gym, upper body
Hips high in an upside-down V, lower the top of your head towards the floor to train your shoulders.
Beta: we're less sure how well one camera can judge this move, so treat the scores as a rough guide.
Phone at hip height, about 3 metres away, filming you from the side.
Your whole body, head to feet, needs to be in the picture. The coach will remind you if it can't see you.
Head lower
You didn't go deep enough. Lower the top of your head towards the floor.
Hips high
Your hips dropped. Keep them high in an upside-down V.