Ok, here is a thing.
I have been moving through weeks 1 - 4, no problems, but not finding it ridiculously easy when yesterday on week 4 day 3 I just had an urge not to walk when told to and kept running for 30 mins. Did 2.9 miles in those 30 mins. I was astonished at myself as I did no exercise at all before this and got puffed out after 60 seconds in week 1.
I tried the programme a few years ago and really struggled through the full 9 weeks; stopping all together shortly afterwards. I don't know why it so much easier this time.
But anyway my question is this. Am I putting myself at risk by stopping the walking early and just running? I don't feel any ill-effects today but don't want to put myself at risk. On the other hand it seems daft to going back to running 5 minute intervals (45 year old man, probably 10kg overweight but falling!).