--I am most impressed: firstly, because I have no musical talent whatsoever, and seocndly, because my wife is an ultramarathoner and I've been involved in the running community most of my life (and wrote a position piece urging the New York Road Runners to allow wheelchair racers into the NYC Marathon some years back, when there was controversy over liability issues and a lawsuit involved . . .)

What you describe makes me wonder about the possibility of Central Pain Syndrome, which usually results from damage to the spinothalamic tracts or the cerebral centers they extend into. Take a look at:

www.centralpain.org