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Originally Posted by danny_shank
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Surely for the swinger the arms and the hands job is to transmitt CF. To do this surely they need to be relaxed, i would think any muscular effort would be disruptive.
As far as Freddie goes to me he's the epitome of a swinger efficiently transfering CF through relaxed arms and wrists.
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The grip tightens significantly (assuming the golfer doesn't have a death grip at address) by the time impact is reached involuntarily so as to stabilize the club. When the club is swinging over 100mph you don't want to have your Great Grandmother's grip on it, otherwise the club would go flying. Most people cannot force themselves to swing faster than their grip strength would allow, doing so would mean the club would leave your hands. Research that was published in Golf Magazine a few years ago indicates that people with more grip strength swing the club faster.
As an aside, I think it is entirely possible that some of Comdpa's swing speed increase came as a result of his grip strength catching up to his ability to apply force with his body. According to Bob Bush's research 70% of a golfer's power comes from the right shoulder. Certainly a person can hit the ball over 30% of their actual distance with just the left arm, but the most efficient way to swing a club is considered to apply most of the force with the right arm and shoulder (my interpretation of Bush's research).
Matt