I hope that people are getting the point that when your are 50-60+, no amount of exercise, diet, fasting, superfoods, medications, vitamins, anti-oxidants, operations, hormone treatments, colonic irrigations, meditations, yoga, DNA re-working or other such is going to turn you back into being 30 years old.
It may ameliorate disease progress and lessen pain but there is a degenerative, pathologic process going on that will get to your vital centers and can become fatally unmasked in high-stress situations.
And, tragically, prior knowledge of a trail cannot protect even a 30 year old in situations of hyperthermia and dehydration.