We all know that tension leads to poor ball-striking. We try to hit the ball hard when we really should be hitting the ball fast. You get fast for no extra charge when you are relaxed, especially your arms.
But it is hard to relax your arms. They might be relaxed at the start, but they tense up as you swing.
That’s because you’re thinking of relaxing the wrong thing. To have relaxed arms, you have to have relaxed shoulders.
At address, relax your shoulders. Now when you take the club back, keep your shoulders relaxed. One sign that you are doing this right is that they do not lift up. Think that they stay down.
At first, it might feel like you are lowering them, but that is because raising them is your habit.
I promise you if you learn have relaxed shoulders throughout the swing, you will get free clubhead speed with no extra effort. Less effort, actually.