Sore Calves

Not sure what is going on but every time I run just now the bottom of both calves gets really tight and sore - very strange and perhaps it could be time for a new pair of shoes. Out today for the 4x2kms after a meeting over lunch stopped me getting a long one in yesterday so will have to try and make that up over the weekend. Big crowd including Tucks, MC, Adam, Hamish etc which meant we were split ino 4 groups. Adam only did three but flew on all of them managing about sub 3.40 pace for his sets. I managed a 3.53, 3.50, 3.57 and finshed on a 3.49 and the stats can be found at http://connect.garmin.com/activity/205723789. Started to feel ok on the last one but not that confident going in to the C2S. Adam will smash 60 this year and I'd be suggesting a sub 57 for him - could be a very interesting race.