Hey all... Just wondering what you guys think. Everything has been going well with the running. I was up to 4 miles for a "long" run, running about 3 or 4 times a week, and all was well. I was even adding in a back to back run, though the day two run was very short, but everything was clicking pretty well. Then a week or two ago, I was on a run and my right calf tightened - BAD! Like a cramp, but not a cramp. So I walked home and rested for a few days. Tried again. This time my left calf tightened - BAD! Both times it was around the 2 mile mark, so not even close to pushing it distance wise or anything like that. This gave me great concern and I started analyzing (which is my way) everything to find out the problem. The only thing I came up with is that I switched my work shoes a couple weeks before the first attack. I went from 3 or 4 year old shoes with pretty much no support, to using my old ultra-supportive running shoes with about 100 miles on them (still plenty support left). I currently work in a bakery, so I am running around for 8 - 10 hour shifts, pretty much without a break, or much of one. So I thought that might be the problem? I switched a couple days ago to canvas shoes with no real support, and after that first day, I have to say my legs felt a difference, especially my lower leg and ankles. They felt more tired at the end of the shift then they had been. I ran 4 miles today, and even though my calves were getting a little tight, nothing severe happened. What do you think? Could those shoes have caused that in such a little time? Or is it something else? Thanks all!