I was wondering if any one can assist with my calf problem. I recently bumped my running miles up to 40 per week and all of a sudden whenever I run I am getting the start of calf cramps. They do not cramp up all the way but both start to feel extremely tight and on the verge of cramping. Then tonight during a swim session my right calf completely cramped up. I could feel a huge knot swell up on the inside of my leg. Like I said during the runs it starts but never actually cramps up. My calfs have always been relatively tight but never had any previous problems. Hydration should not be a problem as I buy a gallon of H2O daily and usually finish it by 5pm and continue to hydrate after that. Any suggestions? or has anyone had anything similar?