Giant Steps--I just read somewhere recently that the super endurance events do take years off competitors' lives. I can't recall if there was some threshold where you went from health improvement to health detriment. I'm having a brain fart--can't recall what I was reading.
There's research that endurance running causes bone loss: www.youtube.com/watch?v=MDMXRgIOJlM
. I imagine this applies to any endurance sport in varying degrees. The book is on my reading list--the author is local--and several running friends have recommended the book.
"It is a mistake to regard age as a downhill grade toward dissolution. The reverse is true. As one grows older, one climbs with surprising strides." George Sand
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