Fergus, I didn't say it was impossible to exercise on a diet of low carbs and as I've said before, bored, bored, bored, that if it works for you go for it. However, you really want to be the kid at the front of the class with an indignant smile and an 'aren't I so clever attitaude'. Eat what you want, I don't care, it is a 'fact' that the body begins exercise from an anaerobic state and, though I may not have as much scientific diabetes/diet related knowledge as yourself (but I am a triathlon coach, county level athlete and personal trainer but I guess that means nothing) but it does mean that the body burns simple sugars at the start of exercise, not for long but at the start; it's all I said, read the **** posting!
You must go very slowly if you're trying to tell me that you don't consume any carbs for a duathlon as body chemistry dictates a burn of simple carbs if you're working at anywhere near 80% of max heart rate. This is not based on just my training but everyone, even diabetics, need fuel to exercise and your stuff about the masai: are you trying to tell me that blood contains no sugar and that it just magically transfers around the body?
They 'only' managed a 5hr 30min run (or someting like that); are you telling me the winner in 2:06 fueled his run with bacon and eggs - I don't think so.
I didn't come to fight but you're nuts and this forum is just crazy; it's do it our way or we'll throw facts and figures in our self-righteous way until you buckle or get bored, well call me the latter, best of luck to everyone.