I have just completed week 2, which I am pleased about because I never thought I'd be able to do it! But I've been doing it on the treadmill because I'm too embarrassed (due to being overweight) to go outdoors running in public. However my husband says running outdoors is much harder - so my plan is when I have done the 9 weeks on the treadmill, I intend to start running outdoors. So my question is, should I go back to week 5 or 6 or something when I start outdoors??