The brain can and does run on ketones, more efficiently, might I add. It cannot run on fatty acids because they are unable to cross the blood-brain barrier.

Yes, I rode lex journal and made some consideration, indeed I realized that I was wrong or misunderstood something...

If I were you, Andrew, I would start carbo load 1 or 2 day before the event by introducing potoes and/or rice (or whatever carbo food you feel comfortable with). The time depending on your ability to metabolise corbos (it may take 2 day with small portions or 1 day with grater portions).

This is in order to assure you glycogen stores are full.
Be sure to be weel hydrated before the event start.
During the event you may use snacks, sport foods or simply fruits (I feel good with bananas) and drink (If the weatheer is very hot, you may put some salt in you drink in order to avoid hyponatremia).

After the event I use Friel/Cordains approach:
priority is recovery (repleniment of glycogen stores and rebuild of damaged muscle)
Immediately after (30 minutes window): easy digestable sources of glucose (honey is great, fruits, or whatever you like), and protein (or better amminoacids). Carbo to protein ratio is 4:1. The key here is to ingest nutrients that has not to be processed by the digestive system, not to stress the body anymore.
Then, the glycogen replenish takes place for a time span that is as long as the race duration (2 hors window for a 2 hour race) you can keep on eating carbs within your meals.

This is what I believe is right to manage races and hard workouts, this is what I (and others) do.

Why don't you get in touch with "the bear"; he lives in Australia!

the-bear@thebear.org

'The bear' doesn't do strenuous non paleo exercise and I don't feel like being insulted either...

I would like to run on fatty acids to be honest as it makes sense but I'm not sure I will ever be able to do it. You have to run/cycle so slowly to keep in your aerobic zone that I may as well just walk. Supposedly with training you can run on fatty acids but an event which I competed in on the weekend my heart rate would of been between 180-210+ bpm

Halfway through the race my stomach was rumbling and I wanted food (even though I was running my heart out) this tells me I needed some quick fuel to resupply glycogen to my muscles. All tho pro's took on carbs at around this point but I kept running.

Hey Igi I think there are a few zero carb athletes on 'Charles's' forum. I wonder how they go? I love the idea of competing well on just meat and fat but I see it's practical to take on carbs during a long race.