I have this recurring problem where I get real knots in my calves after running. They are fine while I run, I do my stretches ok and if I keep walking no problems. As soon as I sit down - ouch they seem to just go hard and bunch up. I've had massage and even accupuncture on one but it still keeps coming back. I am trying this new 'chi running' style and have no problems anywhere else in my body, just there. Do you thing it might be the change from runing by pushing off the toes to placing the whole foot down?? Any solutions please.