Make up a stretch routine and a playing routine for a warm up.
Even if you cannot play the stretch and warm up routine will keep your hands in order. The overlapping benifit of this is you have a bench mark to gauge how your hands are. If for example you struggle one day doing this routine that has never giving you a problem, you know something is not right, so carry on with caution and see if you can play it out, but with caution.
On the other side the routines function is to warm up muscles, get blood flowing and engage the brain in what is to come. It also helps retain what has be gained from all the practice that has gone before, in effect it sustains what you have rather than improve it.
Feel free to adjust and improve any warm up or stretching to suit you ability and fitness, check in the health sticky for some links and ideas.
