Okay, for the third time now I've just read an offhand remark about losing muscle at high altitudes. The one I just read was in a link provided by Wa'il on BCAAs; the one before that was in a book by Dr. Bob Arnot. People seem to rattle this off as if it's a well-established fact.

Hey! I live at a high altitude. Could this cause me to lose muscle? It's hard enough on my workout that the air is thinner up here!

Anyone know how living at a high altitude affects training/performance/etc.?

Thanks,

Allison