Hi - I'm just about to start week 5 and the gremlins are saying I can't do it. I don't see myself as someone who can run continuously for 20 minutes. I am determined to do it anyway, but does anyone have any encouragement / tips for not giving in? I have done every run so far (I'm 50 and pretty unfit) and I think the body will hold up. I've been really encouraged to read posts from people who have just done week 5. Wish me luck.