Irony Alert: We never stretch our calves during warmups. On Tuesday, we stretched our calves. On Tuesday, I hurt one of my calves.
Tuesday's workout was 2 sets of 4 x 600 @ slightly faster than 5k pace. I ran the first set with no problems.
2:25, 2:30, 2:23, 2:25
The second set was going great. 2:28 on the first rep. On the second rep, I was on pace all the way through the 400 and as I was coming down the last straightaway, I could hear someone just bearing down on me. Breathing. Footsteps. So I turned around mid-stride to see if the person was going around. I moved into the second lane to make way and as I stepped through with my left leg, something pulled in my left calf. Just enough to warrant stopping. It was the kind of muscle pain that you know to stop and rest it. So I didn't even try to jog it off.
It is Thursday now. Yesterday, it was very sore and there was a little pain going into my Achilles. Today only hurt when I used stairs, but walking on flat ground didn't hurt. It's still sore. I will rest it tomorrow as well. We'll see for Saturday.