Electrolyte issues when doing extreme sports?

[kevNPGr]

Anyone here who does zero carb take any electrolyte supplements when sweating a lot? On a traditional diet, on a day of hiking in hot weather you would drink a whole lot of gatorade, or even just water with minerals. Any of you guys to extreme sports where you sweat a lot and add electrolytes to the water? Or would you drink blood, or just add a little salt to your water?

[PaganGoy]

Extracted cucumber or celery juice or a peeled tomatoe is best.
I drink the stuff daily when I can, it's really good.