Bend your hand back in a cocked position. Imagine that you are balancing a tray or pizza box. Your hand should be steady, but not over-extended, as this may cause an injury. [5] X Research source
Keep your eyes and head back, rather than focused on the shot. [7] X Research source
A general warm-up can consist of running, swimming, or riding a bike. For specific exercises to target your arms, you can try push-ups or lift weights.
Try walking around the track while swinging your arms to loosen your muscles.