Triathlon: there is a tough sport! The original one in Kona, running a full marathon on hot lava flats, then a 100 mile bike race. The only event of the Kona triathlon I'd have a chance of finishing would be the 2 1/2 mile swim. There is even a Death Valley marathon. Ugh. Just walking in blazing 120 degree sun sounds fatal! These athletes must have body fat in the 2 % range.
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