I know a woman who is consistently in the top two or three in the world in her age group in triathlon, and she is now in her late 70's. She reports never being sick and a range of other physical miracles. Does the triathlon keep her that way, or does her good genetics keep her that way, and by the way also make it easy for her to be a world-class triathlete? The answer is not obvious. Your 93-year-old father is evidence of good genes running around in there somewhere, I would think. Lots of healthy and fit people die or suffer debilitating illness much younger for reasons unrelated to their diet and exercise program.
The underlying idea implicit in these stories from the most fit (or experienced) among us is that they represent the standard of fitness below which people ought not to go for a hike. When stated that way, I don't know many who will find that statement easy to defend. But it is a common attitude among those who work hard to become very fit or who have worked long years to gain that experience.
Rick "wondering how self-sufficient some of these woodcrafty types would feel in downtown Baltimore where I work" Denney
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