After reading on some of the posts the debate about whether you should do some stretches before running - consensus seems to be it is OK to stretch after a run, I changed my normal routine where I have always done some stretches before my warm up walk. On Monday's run I did not stretch before the run just the warm up walk. As I neared the end of my 6 Km run I felt my right calf muscle beginning to tighten up. Later that evening I could hardly walk it was so tight, tried some massaging which helped a bit but the next day I was still hobbling around. The tightness was still there on Wednesday and had eased enough by Thursday when I was determined to run again, I did do stretches this time before my warm up walk then another 6 Km, of which the first 5 - 10 minutes were a bit painful but the pain eased off the further I ran. Later that day after the run there is still some tightness there but nowhere near as bad as on Monday. So I will stick to stretching both before and after my runs.
Not sure if that proves anything or adds to the debate but for me it looks like not stretching before a run is not good.
I suppose what works for you may not work for others. We all have out own way of doing things but the important thing is we warm up and warm down.
I tend to do a warm up walk, then do some light stretches. After the run its the warm down walk and some more intense stretching. Luckily (finds some wood to touch) it seems to work for me.
Try some ice and rest on the calf and hopefully you should be beck running in no time.
Runner56 Thanks for the update I agree we all different nice to see you also stretch before and after.