Setting up with slack in your arms causes you to extend towards the ball when you swing and hit the ball with the heel of the club
DEBORAH DONIGER demonstrates how placing tape or spray on the club face can help you monitor whether it is square at impact
A two plane swing manipulates the shaft on plane by rotating the club. The one plane swing is more athletic and naturally places the club on the correct swing and shoulder path, which is better for women and requires less maintenance.