Start your golf day with this warm up drill: it relaxes your muscles, helps you hit farther and avoid injuries
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
In the one plane swing you bend more from the hips, your arms are hanging down and swinging around your chest and your finish is more rounded. It is easier to maintain because there are fewer moving parts than the two plane swing.