Friend almost died from “water poisoning.”

[Racer X]

Back when my ex-wife did triathlons, I had to make sure her hydration was balanced. Same with double century bike rides. Interestingly, Gatorade has the completely wrong balance of electrolytes for long term use. A qt while exercising, or mowing on a really hot day is one thing, but well over a gallon in a day is way off. I got the powder, and made it @ 1/3 strength. and filled her hydration bladder with it, and had a frozen dixie cup ice cube of it as some cooling to it as well. A couple gallons of that was OK for her.