I'm a female, 5'7" and I weigh 12st 11lb. I've just finished week 3 day 3 and I'm finding it too easy. Considering I am overweight and before this program I never had exercised, how is that possible? I do the whole program, but have enough energy left to just run non stop the whole way back? Am I just not running fast enough or am I suddenly super fit? Haha. Obviously I don't sprint but I'm not super slow? Just normal jogging speed.