Damn! Again

So I ride the bike for 25 minutes last night. Good for 55 minutes of excersize for the day. So this a.m. I walked for 10 minutes and decided to test out the calf. 2 minutes on @ 5.7 mph and 1 minute walk @ 3.5 mph. First time good. Second time good #3 calf went again. Hurts like hell and I can barely walk. Iced for 20 minutes. Damn!