Mark Immelman, host of the On the Mark Podcast, shares 24 Advent Season Golf Tips to help you improve your golf swing. In Tip #8 Mark addresses an important principle to controlling Golf-swing Width and Radius, Path, and Angle of Attack. Understanding how, and where, the Trail Arm works in the backswing and downswing will set you on the road to more control and better ball-striking. Immelman's lesson includes a PGA TOUR tested drill to quicken your feel and learning.