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I amd moving this post to the "Fit for Golf forum". Vickie Lake is the moderator and she has worked with a lot of athletes and golfers and she might be able to give you some tips on how to take care of this.

For me, I know that if I do something new I tend to get sore until the new muscles get used to it. What you are describing sounds like a muscle issue and not a joint issue - I think this is good news!