OK, after finishing treatment for breast cancer last year, I decided 3 weeks ago to register for Race for Life, even though I've done no real exercise for over a year. I've only done 3 weeks of the prog and I have to say I was really enjoying challenge and looking forward to each run - until this week that is. Both my knees are really painful and I'm going to have to take a few days out. I've never had bother with my knees before and I've been sticking to the local running track and treadmill at the gym for training. I'm really angry with myself cos I'm an all or nothing kinda gal and really wanted to run this 5K and not walk/jog it. I'm struggling with my conscience as quite a few of my friends/family/colleagues have sponsored me and already I feel I'm letting everyone down. I just don't know if I'm going to be fit enough for this. Arghhhhhhh!