Early on in our hiking adventures, a friend became very nauseous toward the end of a big hike on a hot humid day. That's when we became aware of hyponatremia.

On the hottest (90s), muggiest days hiking in Shenandoah National Park (Virginia), we've each packed a gallon of water/gatorade for a 9-10 miler with 2000-2500 foot elevation gain. We learned the hard way to go 50-50 with Gatorade/water.

On those hikes I've consumed 96 oz of water (3 Nalgenes) and sweated it all out.

I mean all of it -- no need to empty my bladder.



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