Just started looking at Chopin's Op9 No1 Nocturne. But this has really highlighted by discomfort with wide spaced broken chords in the LH. I feel I can the motion fine, but my hand and arm feel tense. Another example would be the LH in 25/2 - not especially wide, but for some reason I become tense and this causes my hand to fatigue quickly.Not sure what this is about, as Im playing special attention to use wrist motion rather than reaching for any notes (cartwheel technique). When I see vids of people playing these type of accompaniments, they seem to be totally relaxed, so Im not sure where Im going wrong.Anyone know of any good pieces / exercises that might help me develop this technique? Previously Iv not worked on much romantic music (only a few easy preludes), so Iv not had to deal with this to date.Cheers,SJ