I did week 3 this week (my 5th week with the app, I think). I never did make it up to 3 minutes. I was planning on just going on to week 4, but it might be good to do week 3 again. At this point, I seriously doubt I will ever run for 3 or 5 minutes straight, let alone as much as they expect us to run at the end of the app.
(Dang, there are a lot of I's in that.)