In order to consistently maintain your spine angle and therefore your swing plane it's super important we actually set your spine angle in the right place right from the very start. Also the start of the swing is the address position so if we can go ahead and get you in a good spine angle position from the start there's a best chance possible that we're going to be able to maintain that spine angle down to impact.
How To Set Up And Hold Your Golf Spine Angle (Video) - by Pete Styles