Depends... if it looks like it's going to hit the pocket and score a strike, I make a punching motion at the pins when the ball hits them, lol.
I've been told that it's best to hold your position at the foul line after release until the ball rolls over the arrow you're targeting. I am going to try this when I go bowling next time and see if it helps me. Right now, I just let my arm swing like you do, so I don't know yet whether it's best to hold still or let your arm swing.
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