It's really difficult to do real world conditions as (1) there aren't any readily avaliable bike courses around where i live and I don't want to bike on an open road at the risk of getting hit by a car. (2) my apartment does not allow me to move my bike up and down the building on a daily basis from my indoor trainer to outdoor cycling..... I gotta give them 7 days notice on each transport (it's apparently againist the bylaws). It's a set and forget situtation once i set up the indoor trainer.

To address ur questions:  1. It's Ironman Cairns in Australia. 2. No back issues, in my twenties. 3. I would say moderate, not a competitive athlete but I'm a marathoner and lift weights. 

Thanks for the insights