Hi everyone, I run outdoors, i go to a lovely lagoon with a concrete pathway around it. I'm on my second attempt of the program. I quit the first time as my calf muscles hurt so much during the walking intervals. I'm on my second go (w1,r1) and am determined not to quit even though I have the same problem. I jog slowly and then when I slow down to walk my calves burn so much that I'm at snails pace. My legs feel fine while jogging. What the? Has anyone else had this problem or any advice on what I can do to alleviate it? It's so frustrating! I feel like an old lady during walking intervals.