Comment by soco

Extreme sports is definitely nothing "normal" - whether I define "normal" as a today's statistic, or as evolutionary history. Your needs and metrics are nothing Joe Regular can use in his daily life, which the OP pointed very clearly and you don't need to refute. Your body is a completely different beast and we would be comparing apples with oranges, only confusing an already confused domain. Because I don't believe that any of your guidelines about guts training is coming from "general surgeon advice" - you are using specialized forums and special indications, while this discussion here is on a general forum, about general indications.