I did this program in 2011, with american podcasts and completed it (I think i repeated one week twice though) I ended up eventually running 10miles (albeit at a slow pace I am not a natural runner!!) then I gave it up. Got unfit put on weight etc etc. Now I am starting again (week 3 done!!), and wondering why I stopped in the first place! I am pleased that the NHS are now doing these podcasts. I just wanted to share my experiance with people doing this to let you know it can be done! I only wish I never stopped after completing it, and should have carried on!