while. Pushing off with your toes puts more stress on calves.
Massage and stretch your calves before and after. Also stretch your calves again after the first 8-10 minutes and any time they feel tight. Every other day is good. Stretch your calves on off days as well. Ice on the calves is good as well.
Try ibuprofen before a run then again in the afternoon.
Google various calf stretches. Lots of hydration for cramps. DON'T do your sprints on an incline.