Believe it or not, the arms should not rotate or roll during the golf swing. After the follow-through there may be a slight shoulder roll due to the momentum of the swing, but if the arms are rolling during the swing itself this means there is probably not enough extension during the stance and the swing.
Arm rolls cause the wrists to cock too soon; they should do this only at the very end of the follow-through.
One problem with an arm roll is that the club is not held properly throughout the swing. Many amateur golfers tend to hold is too straight like a large stick or bat, thinking this is necessary to hit the ball head-on. The arms do need to stay straight but the roll needs to come from the shoulders, not the arms themselves.
Watch your arm roll when you swing, especially during your forward swing. An arm roll is a quick way to correct a swing that is set up incorrectly. Your arms are probably not being held straight and the plane of your swing is probably off. In any case, the arm roll shouldn’t be necessary in a properly executed swing.
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