Thank you all for these quick and thoughtful responses.
Andrea @Helen0609, I should have clarified that my issues are specifically with an electric guitar, too. Like Joshua @Jamolay, I can’t play in the posture of James Frankland. His shoulders and neck being hunched forward like that, and his right elbow so far back… I wouldn’t last 5 minutes that way. Also, I never see these people barring the first fret, which is where angles are the absolute worst for me.
This describes very well where I find myself:
And I haven’t yet found a way to do that while sitting.
It is true that Justin has some bend in his wrist even when he’s demonstrating the F barre chord here:
But, starting at about 10:56, he talks about not bending it too much and says that’s where you can do damage to tendons in the wrist. This bend is what he says is acceptable:
But this is not and risks doing harm:
I haven’t found a seated position that enables me to do the F chord like the first image. They’re always more like the second. If I stand, I can comfortably do what Justin recommends.
So, yes, Peter @rorystrat, I’m experiencing wrist pain from too large an angle in my wrist. If I didn’t, I’d be perfectly happy doing it.
Joshua @Jamolay, I agree completely that my quest is to find a way to hold the guitar while seated in the same position that I do while standing. I have researched the classical position pretty extensively, including many of your posts here (thank you). Big Issue #1 for me is the rotated pelvis when one leg is higher than the other. That just isn’t going to work for me. I’ve tried splaying my legs and dropping the guitar between them, but that is also not comfortable for my pelvis/hips.
Tom @Tbushell, I don’t think my seat is too low. In fact, I just lowered it a lot after using it higher for 9 months. Only now can I place both feet flat on the floor and have my thighs parallel to the floor.
I keep coming back to the reality that guitars weren’t really designed to be played while sitting, so people have contrived ways to make it work. Then newcomers follow the lead of those who preceded them. It reminds me of the QWERTY keyboard that was actually designed to slow down people’s typing. And yet we continue to use it.
Andre Fludd talks about it more than most I’ve seen: https://www.youtube.com/watch?v=hz32TgPENRI
But now there are ergonomically designed electric guitars where they’ve put thought into how our bodies fit with the instrument. I’m very intrigued by .strandberg* guitars. Something like this:
looks much closer to what I’d like to be able to do. And these guitars offer many possible positions, which is good for people like me who will become uncomfortable in any position for too long. I hope to try one in the coming months and see if it’s something I want to pursue.
I’ll try to get some photos to show where my problem areas are. Again, thanks everyone.