There's no mention of the fact that the food we eat is also a significant source of water.<p>This is a common misunderstanding around those "you need X glasses of water per day" recommendations -- much (sometimes, most) of your needed water comes in your food and doesn't need to be consumed as a separate thing.<p>And even though there are other health considerations to them, water you take in the form of coffee, tea, soda, etc., also counts.
Isn't the 8x8 rule that they try to expand on firmly established to be pseudo scientific myth?<p><a href="https://journals.physiology.org/doi/full/10.1152/ajpregu.00365.2002" rel="nofollow noreferrer">https://journals.physiology.org/doi/full/10.1152/ajpregu.003...</a><p>Woo + math == woo
Converting the article's recommendations to metric, that's 1/32 of your body weight + 680g per hour of exercise + 680~907g depending on weight if you're pregnant or breastfeeding.
<a href="https://xkcd.com/1708/" rel="nofollow noreferrer">https://xkcd.com/1708/</a><p>I often heard really exaggerated advice about how much water to guzzle every day. It got crazy.<p>One day several years ago, a nurse was taking vitals on me and told me to drink, I don't know, 48 cups per day or something? It was huge. And I regarded her with incredulity. So upon being taken in to see the doctor, and this was a physician that I really trusted and had a good long tenure, I repeated the advice and I said, "That's BS, right?" and she said yep, and I'll talk to that nurse...<p>I am especially wary of my fluid intake because I live in an urban desert. Therefore I must constantly drink fluids when it's hot to stay healthy and hydrated. However, I must also gauge my ability to find a bathroom while out on the road, and when you ride the bus, good luck with that! It might be 3 hours, or you're forced to make a small order at a restaurant to become a customer. So it's really a delicate balancing act of how much to drink. And also, remembering to use the bathroom at every opportunity!
You have a hyper-intelligent system that calculates how much you should drink, it's called thirst. Drink when you're thirsty, mostly water, end of story.
IMO people way overthink this. The range of acceptable amount of water is large, you don't need a formula to calculate some exact amount per person.
After having a kidney stone removed I've implemented some simple rules:
glass of water after waking up and before going to bed, glass of water with meals, drinking during physical activity and then during the day I monitor my urine color and drink a glass of water straight away when if it's dark.