Posted: 04/11/2015 at 16:07
Outlaw was my first (and only so far) Iron distance, so I'll +1 that as well. I ended up shuffling (you couldn't call it a run) the first half of the marathon and alternating shuffle and walk for the second, but it was the first time I'd attempted a run over 13 miles. So you certainly don't need to be a trained marathon runner just to finish. I'm hoping to do a bit better next year!
I'd take run training slow and ramp it up as the weight comes off - its probably the easiest way of injuring yourself, and that drops you back into the I'm-injured-so-I-can't-exercise-so-I'm-putting-on-weight-again cycle. As Cougie says, if you're within range of Nottingham come and volunteer in the summer and you'll learn a lot about what goes on - I certainly wish I had.
Good luck with the training!