i too have/ am getting probs like those above. apart from rsi type symptoms, i put the other causes down to creeping old age.

however, when playing guitar in c i usually capo at 5 & play g shapes- far more comfy. d can be accommodated at 7 ,also g shapes.

the squeezebox is harder, when i feel the aches & stiffness coming on, i just have to stop playing for a while or switch to mouth organ or guitar.

a friend at work said cod liver oil can be good for stiff joints-haven't tried it yet, anyone else?