I have just completed the first run of week 7 using the podcasts. Have to say these are great, I would not have done it without them. I had spinal fusion surgery 11 months ago and have not even been able to run for a bus in years, I walked with a stick 3 years ago. I have amazed myself with what I can do. I did find the 25 minute run hard today as I had calf pain. Has anyone else had this and any tips to overcome it?