Interesting discussion at the office today. A few people at work are in the triathlon and running world so we get some interesting water cooler talks going on occasion.
Topic came to Ironman about target times and how they piece together. Being a numbers guy at times I came to this following conclusion as I was at the Avalon Dairy Store (My new great find in Vancouver for organic dairy produce).
If you take 10 hours as a IM time for ease of math, that equates to 600 minutes. So a 1% improvement saves you six minutes over the space of the whole day. If over your whole training build you focus on improvements from this perspective then I think targeting a improvement can become a lot more realistic.
The faster you get, the less each % point gives you in terms of improvement and the harder these performance points are to achieve, but that is the fun part of it.