Cricket, bowling

Seam position and release

Release with the seam upright and your wrist behind the ball, fingers either side of the seam.

Beta: we're less sure how well one camera can judge this move, so treat the scores as a rough guide.

Start trainingUses your camera. Video stays on your device.

Set up your camera

Phone side-on to your delivery stride, about 5 metres away, so it sees you from gather to follow-through. Shadow bowl: no ball needed.

Your head, arms and hips need to be in the picture. The coach will remind you if it can't see you.

1Make the grip: first two fingers on top, thumb underneath.
2Imagine the seam, the ball's stitched line, running straight up between your fingers.
3Swing your arm over high and straight, past your ear.
4Keep your wrist straight and behind your fingers as you let go.
5Follow through, letting your arm sweep across your body.

Keep your arm straight
Your bowling arm bent and straightened. Keep it straight through the delivery so your action is legal.
High arm
Your arm came round low. Bowl with a high arm, brushing past your ear.
Follow through
You stopped after releasing. Let your body follow through, bowling arm sweeping across.