The Ravel L.H. concerto and reflections on posture

Seeing Bavouzet perform Ravel’s Concerto pour la main gauche at the Proms last Friday was an immensely inspiring experience. His technical assurance was such that he made the flashier, more mercurial runs and fiendish final cadenza seem like a spontaneous outpouring.
I had some serious goose-bumps several times during Bavouzet’s performance, which more than made up for the lacklustre première of Arvo Part’s fourth symphony, which I’d be inclined to describe (at best) as inoffensive.
It’s only recently that I’ve seen other pianists perform works for the left hand in concert. The other was James Rhodes, in recital at the Guardian Hay Festival. There, James played the Blumenfeld Étude pour la main gauche in A flat – and, as was the case with Bavouzet, one really wouldn’t aware of it being a single-handed performance, were it not for the fact that both pianists at various points used their right arms to brace themselves against the side of the piano.
This element of posture interests me – I’m not sure (and perhaps James will be kind enough to comment on this if I prod him on Twitter) whether it’s deliberate or almost unconscious. You see, when I play pieces for the left hand alone, I tend to keep my right hand rather demurely anchored on my right knee.
Now, I’ve never noticed any extraordinary aches or pains while playing, for example, the Bach-Brahms Chaconne, but when I work on the Ravel – particularly the evil (for me) jumps up and down the keyboard at the end of the first cadenza – I come away feeling a bit the worse for wear, particularly in my back muscles. It’s early days – I don’t have to have the piece learned until next spring – but I’d be interested if any of you who play pieces for left hand alone have any thoughts on the matter… does a gentle lean into the piano with the right arm help matters?
Great piece Stu. I think posture is such a personal thing – if I were playing the lh concerto which is obviously so much longer than the etude I played I’d no doubt be moving my right hand all over the place from lap to side of piano to brow-mopping etc!
For me though it seems to really help having my right hand on the side to create a kind of fulcrum. I sit a little further to the right than I normally do and the only time having my right hand there gets in the way is if I’m playing in the top couple of octaves. Otherwise it seems to help strengthen my body and anchor my position. Who knows if I’d moved it I might have fallen off the edge of the piano…