Here's from a post awhile back, which refers to the thumb down part. It helps a lot.
Trailing Arm Tip
Heres a trick from Kegel to help you keep from pulling shot's.
One of the best ways is to keep the trailing arm back, but even with your shoulders.
To do this have the thumb of your non bowling hand turned down and slightly pointed toward the approach behind you.
This will help lock your arm and keep your shoulder from rotating and help keep your balance in check.
When you watch the pro's keep a eye out for them doing this.
![]()
Bookmarks