Which is why I didn't drink any water after the halfway point when I ran my marathon...and also why I don't carry any water bottles on my bike: No water, no weight gain, no hyponatremia. I just drink as much as possible when rested.

But "hitting the wall" due to mineral (sodium, calcium, etc) vs glycogen depletion are separate issues (which is a point made in one of the videos I posted above) and provided there are sufficient stores of fat and protein (and the body is accustomed to processing them) I don't see any reason why glycogen depletion should necessarily lead to muscle breakdown...especially since it's ridiculous to think that man could have ever kept his miniscule glycogen stores undepleted under the frequent heavy exertions experienced in the wild (because aside from the fact that it's unrealistic to think one would even be able to feast that frequently in the wild, the glycogenesis promoting carbohydrate heavy diets 99% of the human race currently eats are also a luxury that's only been afforded to us since the invention of agriculture and cooking...without cooking our bodies don't even store that much glycogen because we aren't able to digest most raw carbohydrates; believe me I've tried).

Also, for a given effort, I seriously doubt cyclists experience the same degree of muscle injury as runners. IMO that's a problem caused mainly by the anachronism of coupling pavement technology to natural legs when it's really designed to be coupled to wheels. In other words, running on pavement is like sticking your leg in a meat grinder...a simply inappropriate and harmful use of technology.

I'm sure the moderators could move it over there if you asked them.

Maybe I should mosey on over there myself as it seems I've developed an interest in nutrition (when did that happen? ) though I remain vehemently opposed to training.