Oh ok, that's good to know. I've been avoiding continuing exercise, whatever it is even muscle toning stuff, until previous pain is all passed. Makes for sloooow progress. I guess now I think about it, if you allow the muscles too much leeway with recovery, they'll never learn to toughen up!
This thread proves how useful this forum is. Having read the above posts, I have now decided that despite still being extremely stiff more than 24 hrs on from a half marathon. I will run tomorrow (albeit in a very elderly and gentile manner )