punkin said:
I play with the guitar slung a little low when standing up. It's comfortable for me. Teach wanted the guitar up high with the head at about shoulder height. I think this is more of a classical approach.
Thoughts about the thumb or on posture?
I completely agree with what your teacher says. I studied classical guitar a few years, got MAJOR wrist problems to the point that I CAN'T play guitar anymore for longer than 15 minutes without serious aching, and have learned alot of postures because it's the only way for me to play anything. (I mostly play sax and piano now.)
Posture is not that important if you're just the occasional rocker, play a few hours a week. If you get into practicing seriously, I'm talking over an hour a day, you gotta watch your posture. If you take up more instruments also. If you don't watch your posture now, you might end up with wrist problems, that'll have you finding the right posture to play anyway, and probably they might even have you playing no more than an hour a day IN THE RIGHT POSTURE.
If you're serious about playing, don't mess with it. There's nothing worse than not being able to play. I tend to get quite emotional and angry when discussing wrist issues. There's a reason for that. That I have a pianoexam next tuesday, and that I have to take painkillers in advance to get there is just a part of it. (I don't take 'em to kill the pain, they keep down the inflamation.)
Finding the right posture is easy; put your hand in a relaxed position, wirst straight, and elbow in a 90° angle. Then put your guitar in your hand. That's the best position to play. No more tension in your wrist than necessary.
It's also depending on what you play. If you're playing a half hour set of powerchords, your position might even be better, causing less cramps. But if your doing some serious chordwork, soloing that involves more than the pentatonic bluesscale and the occasional bend, fingerpicking (which is actually pretty much the same as serious chord work...), then you should look for the right posture. And make sure you don't stretch any muscle that you don't have to stretch. Effective laziness. No more tension than necessary. Really. You don't wanna end up like me.
