I'm 52 and hadn't run/jogged since school in the early '80s! I finally worked up the courage to try C25k on May 4th. On the first run I thought I was going to die and did quite a bit of stealing (lengthening walk times and reducing run time!), by the second and third I was incredibly proud of myself and looking forward to starting Week 2. But the day after day 3 both my knees got incredibly painful. I'm guessing it's because I was running on tarmac?
So I'm now half way through what would have been my Week 3 and I keep applying ice 3 times a day. I hope I can start again soon.
I was so enjoying the process that I feel quite disappointed!