ttc wrote:
Good post. But we read in 'Running With The Buffalos' of them hitting low 20's, at hilly altitude no less. Recreation groups around me hit 20 miles. I just can't see it being that huge a deal for a pro, who builds up to it.
You are absolutely correct that advanced runners can build up to running over-distances. I think I mentioned in my earlier post that it takes time. You also acknowledged that it would take time. And not months, but years (see Lydiard.) And those who may ultimately benefit from those types of runs are a rarity in running, even as a pro. I'm still of the opinion that runs of that distance in preparation for a marathon are overkill, and likely not sustainable for long periods of time.
Someone mentioned that they ran 31 miles one day and then raced XC the next. My point is not that you are laid up in bed for days after 26 mile training run. Though I'd be surprised that anyone would go out for a run that long the day before their goal race. That's just not optimal.