I agree with Bucket swinging takes no physical effort all you have to do is stay ahead of the club.
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"The statistics on sanity are that one out of every four Americans is suffering from some form of mental illness. Think of your three best friends. If they're okay, then it's you."
Right . . . BUT remember Homer was a HITTER . . . you can be a WUSS and Hit. I'm proof positive of that . . . I'm the biggest wuss on the planet and I can Hit.
Homer says it just takes a POUND of Lag Pressure . . .
Ok, forearms are a necessary part of the whole formula. But always remember that they are secondary to the, dare I say, core muscles of the body. The only reason the tricep is the primary driver in the hitter's protocol is that the large chest muscle and the lat muscle have both performed their function in relation to the effort you intend to perform in the golf swing. The agreements of the performance of muscles would be different if your intent were different . . . but it's always consistent with the necessary effort.
That is why 'training for golf' outside limited guidelines is a waste of effort. I have seen many golf programs. They rarely look at the natural and neutral neurological associations of a natural spine . . . the basis upon which all of the unique golf positions are applied. If you get this . . . then you can understand that exercise is easy in its choices but more difficult in its application, and then you can make progress.