I inadvertently (re-)discovered a useful diagnostic trick:
1) Videorecord your playing.
2) Rewind, playback...
3) ...and during playback, fast-forward.
I was pleased to discover that even though I was wearing a shirt with a floral design, my torso didn't move appreciably (or rather: the floral design made clear that my torso was still).
Yes, I still have work to do... in particular, my neck and shoulders contract, and even though this seems to facilitate maintaining pitches precisely, I can't imagine that this would be comfortable over long stretches... so, in practice sessions, I have to make a conscious effort to lift my head and extend my shoulders out... i.e., to practice what I've preached in previous posts here.
1) Videorecord your playing.
2) Rewind, playback...
3) ...and during playback, fast-forward.
I was pleased to discover that even though I was wearing a shirt with a floral design, my torso didn't move appreciably (or rather: the floral design made clear that my torso was still).
Yes, I still have work to do... in particular, my neck and shoulders contract, and even though this seems to facilitate maintaining pitches precisely, I can't imagine that this would be comfortable over long stretches... so, in practice sessions, I have to make a conscious effort to lift my head and extend my shoulders out... i.e., to practice what I've preached in previous posts here.