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ChristianKl comments on Stupid Questions May 2015 - Less Wrong Discussion
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I think a sport drink is basically a branded version of this.
Given that sweating while dancing means loss of salt, having a drink with a bit of salt to replace the lost salt seem reasonable. Replacing all your water consumption with a isotonic drink on the other hand doesn't seem like a good idea.
As far as sugar goes I would use a more complex one than glucose.
I figure unless we are extremely anal about our diets and never eat fast/street/microwave/bakery food, not consuming enough salt is about the last things to worry about. I figure the majority is on the far too much sodium side.
At 1.5 liter per that the averages person drinks, having to make sure that you ingest enough salt isn't important.
On the other hand at 5 liters day, things look different.
When I go dancing I think it's plausible that I sweat out 2 liters of water. It's worth thinking about whether those two liters should be replaced by salt free water or by a isotonic solution.
There also the separate issues of how strong one considers the case about people eating too much salt to be. Michael Vassar who was MetaMed's CEO for example argues that in the average European diet there's not enough salt.
Thanks. The sugars in my cupboard don't say what molecule they are, but I assume sucrose, so that's what I'd go for by default.
I personally use maltrodextrin when I want to add calories to a drink.
Flavorless (kind of, makes tap water "taste more like tap water" to me), but it has an insane glycemic index (higher than pure sugar, by some molecular miracle I've never investigated), which makes it great for replenishing energy while working out and terrible otherwise.
(Actually, on that note, I improved my jogging performance by 20-40% by adding 75 calories of maltodextrin immediately before starting, and completely eliminated the "I'm dead now" period afterwards with another 25 calories; I had a tub of the stuff left over from weightlifting, which since I've moved and haven't joined a new gym I'm not doing anymore.)