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I'm getting a pain in this particular tendon when I run any distance over about 5 miles. I don't feel it when running but feel it first during the warm down (particularly streching the hamstring) and then for the next couple of days, which makes me anxious to go out again until it stops.
Is it common, is there a way to get around it, and is it a bad idea to try and run through the pain?
I've looked on a diagram, the technical word seems to be "semitendinosus", well the pain is right at the base, directly behind my knee.