This is obviously his natural motion and would be a mistake to try to change. A vertical arm swing worked pretty well for Jack Nicklaus, Davis Love III, Fred Couples, Jim Furyk, Ray Floyd and Tom ...

Second is an arm swing that stretches the front of your upper ... Then slowly stand up and do 10 rows as if pulling on two vertical chest-high handles, focusing on bringing the shoulder blades ...

Going into the move, remember that a swing is nothing more than a hip thrust in a vertical position ... overhand grip on the horns (or handles), arm extended straight down in front of you.