Gym, core
Lean back with a straight spine and rotate your shoulders side to side.
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, facing you.
Your head, arms and hips need to be in the picture. The coach will remind you if it can't see you.
Twist further
The twist was small. Turn your shoulders until your hands reach beside your hip.
Lean back a little
You sat too upright. Lean back with a straight spine to work your core.
Sit up a little
You leaned too far back. Sit up a little so your back stays straight.