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Eh.
There's plenty of salt in the food that I consume when backpacking, between dehydrated meals, GORP, Clif Bars, and jerky I've never had symptoms of lacking sodium or felt the need to supplement with electrolyte drinks, if anything there's a surplus of sodium in my trail diet. Post hike, a nice sized Gatorade upon arriving back at the trailhead is always nice of course.
FWIW,
I've used Hammer HEED on trail runs lasting more than 10 miles or so, any mileage <10 plain water is sufficient, even for 100F afternoon runs. In the 20+ mile range I've found Hammer Perpetuem to be the best in feeding my body and replenishing lost electrolytes through excessive sweating- backpacking rarely, if ever, causes me to sweat to the point of inducing cramps due to low electrolyte levels.
Here's what I will occasionally throw in my bottles for a trail run, but never for backpacking, like I said, my typical trail grub takes care of salt for me:
Hammer HEED (excellent) Hammer Perpetuem (sustained activities lasting several hours) GU Brew (good, kind of sweet) S-Caps (great for long sustained activity, if sodium is the objective these are easier than fiddling with powdery sugary drinks, but does nothing to stabilize glucose levels )
Edited by Eugeneius on 02/18/2011 12:20:16 MST.
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