Ok, this might be one of the more obscure topics, but whatever.
I am going to Ecuador this December to climb some high volcanoes (Chimborazo being the highest at ~20,700' and the guiding service I am going with sent me a packet on training for altitude.
One of the things they suggested doing to mitigate the effects of the drastically decreased oxygen levels at high altitude was to eat a high-carbohydrate diet, specifically one with at least 70% of calories coming from carbs.
I am a little concerned about this, because I am not sure what facts/studies/etc they are basing this on. I don't want to feel like crap and not summit because of some unknown factor that causes me to need more carbs, but I also don't want to feel like crap and not summit because I followed their advice and ate more carbs when I'm used to eating primal.
I could understand needing a few more carbs than I would in everyday life because of the massive amount of physical exertion involved in climbing at altitude, but cannot fathom eating 70% or more of my daily food as carbs.
Though I've never been at really high altitudes, I've done plenty of climbing to 14,000' here in Colorado where I live and have never had problems with the altitudes here despite eating mostly primal meals/snacks before and during these trips.
So what's everyone's take on this?