i have been lifting for a while now and my diet is working well for me. However, monday while doing a set of calf raises, my legs cramped up to the point where i couldnt finish. I think this could be due to a lack of potassium in my diet. I eat two large bananas a day as part of a complex carb/lean protein/mono un. fats diet for over 5000 cal a day. If this could indeed be the problem, what other foods provide potassium? or should i just get a potassium supplement pill?