Calf Cramps

I have been fighting calf cramps off and on during the last two months of training. I believe mine are from two issues: dehydration and strain. These two excerpts apply to me and may help you as well:

Calf Cramps: Causes and Solutions
Calf cramps can be exceedingly painful, and everyone has experienced this pain at least once in their life. The most agonizing pain comes at some point during your sleep, but painful cramp pain can also occur during athletic training.
http://www.associatedcontent.comarticle/218563/calf_cramps_causes_and_solutions.html

Calf Cramps: Causes and Solutions
Calf cramps can be exceedingly painful, and everyone has experienced this pain at least once in their life. The most agonizing pain comes at some point during your sleep, but painful cramp pain can also occur during athletic training.
http://www.associatedcontent.comarticle/218563/calf_cramps_causes_and_solutions.html