Short runs and Calf Exersizes

Been doing short 2mile runs around the block, with no pain and pushing the 8min mile barrier.  Also been doing a lot of calf exersizing - but still not enough.  Doing 10 lift reps, 2 reps on both feet, then 2 reps on each foot.  I think I'm starting to feel less pain/stretch during these exersizes.