This any good?
Been squeezing out 3.20 mile runs 3 to 4 times a week now which I'm finishing in around 30 minutes or so, again a huge improvement from the end of April where I'd keel over and almost die after 7 minutes. Up until then my heart rate was around 85bpm. Checked it the other day with an iphone app and it's now 63bpm - this stuff really works!
Joined a running club last week for support, that's where I did the 4 miler. There were a few other new joiners there too but they were absolute beginners. When I returned after the run I slumped down on the grass near where the other noobs were, exhausted. After a minute or so I was chatting to one of them saying how tough the run was to which she said "What are you talking about? You're not even out of breath!" - and she was right, I hadn't even noticed it.
It's really motivating when you find out things like that, as it was for my heart rate. That's always been key for me, motivation. Good luck to anyone else starting off doing this as well - the rewards are awesome