Working as a medic at Primal Quest was an incredible experience. I was in the Moab area for about 2 weeks providing medical care for these impressive athletes. The course entailed 450 miles of running, kayaking, swimming, biking, canyoneering, and more. Also excessive heat, no sleep, intense terrain, massive vertical feet of gain, insane ropes courses, and the list goes on. If you own a TV, you might watch for this on ESPN 2 this October
Here I am telling these folks they have to poop in a bag and carry it out. Notice the look on their faces.
In the 100+ degree super arid heat, you just could not hydrate enough.