The Science of Hydration: How Much Water You Really Need

**CLARIFICATION** Hi everyone, I misspoke at about 08:58. I meant to say, "Dehydration is actually the process of moving from a state of Euhydration to a state of hypohydration." I am a little bit surprised that none of us caught this in post-production, but we may have been a little distracted from our channel getting temporarily taken down by the hackers... 😡 Thanks to those who caught and commented on this and thanks to all of those that helped let us know about the hack! Stay anatomically awesome! (Yes.... that was nerdy...

I have asked myself this question so many times and still can’t believe I have to learn this from youtube instead of our governments and schools.😢

So happy you are back and I am truly sorry you were hacked. I just don't understand what motivates some people. These videos are excellent!

I have (spastic) cerebral palsy. I can't tell you how much proper hydration helps me reduce muscle fatigue, reduce the pain and stiffness of arthritis, and many other things. I take hydration very seriously.

This isn't talked about as much as it should be! Thank you for a channel of your size bringing more awareness to hydration. I work a labor job and in an 8 hour shift I see basically 90% of my coworkers never take one sip of water, even during breaks. Not good!

Thank you so much! In past years I did regular hikes of 5 to 8 hours, in a hot climate, say from 5.00 to 13.00, living in the Caribbean. (Wide brimmed hat, sunprotection longsleeve clothing etc.). Lots of people, even those with some medical background, have warned me against my 'excessive' drinking, as I usually drink about one liter per hour, do a little bit of frontloading (half a liter or so) and sometimes top-up afterwards with one or two liters because I am really thirsty at arrival. On an 8 hour walk, around 10 liters. 'Nonono, do not do that, you will die from overhydration if you drink more than 5-6 liters per day', they say. I always tell them I practically do not urinate but still lose weight during the hikes even while drinking so much, and that makes them hesitate a bit, but still convinced I should drink less (and faint from dehydration I suppose). So thank you for this video, it explains exactly why my drinking is justified for the amount of physical activity and the hot climate. (a day at the office, I only use around 2.5 to 3 liters) Will be interesting to see how all the 'experts' will react to this (and info I found on other websites that confirm this) information.

My Urologist says the excessive over hydration can cause over use of the bladder and affect the internal membrane of the bladder. I was told to drink when thirsty and when thirsty drink only water. Said she sees over hydration more these days because of the belief that drinking excessive water will make you more healthy and weird ideas about keeping the kidney and bladder healthy, to extreme neurotic ideas about cancer prevention.

I've been drinking 3-4 liters a day for several years, and I genuinely believe this is the reason I don't suffer from a lot of issues other people describe to me that sound hydration-related. Makes even more sense after seeing this explanation too

There was a case where a radio station had a contest about who could drink the most water, and one of the contestants died from too much water.

I took a shot of water everytime he said water

Your videos helped me so much with my examen. I am a dietitian and thus only ever saw basic anatomy classes, but seeing all those things learned in school on a real person helped me out so much! Thanks! :)

Would be interesting to compare water requirements while in sauna, vs. steamroom, vs. exercise. Also exploring the connection between muscle cramps and hypohydration.

Dehydration due to living at high elevation is also a factor. If you visit such places, hydrate more often.

When I played college, coconut water was the best halftime hydration choice. My second half energy was almost as good as starting fresh. Better than water and the various gatorade /powerade drinks that make breathing sticky.

Now is a good time as ever to say: Thank you all at Institute of Human Anatomy! Awesome channel.

Glad to see you got your channel back so quickly. I've seen some take much longer after they've been hacked.

TYVM! My thyroid went hyper causing me to sweat horribly which lead to an overnight stay in the hospital. I've found it difficult to get rehydrated properly. Will be picking up some test strips! Thx again! I wish you could truly know how much I appreciate your content!

This is a really informative video, I thought my physiotherapist was crazy when he told me the amount of liquid I should be drinking while working (car detailer) I don't visibly sweat so i never used to drink that much however ive had alot of muscle related injuries and turned out to be a lack of hydration as a big part of it. I usually drink 1L of electrolyte and 2L of water while working now.

Thx for covering this topic. I tend to drink close to a gallon of water most days due to medications and stage 3 kidney disease. Most days my urine is clear to very pale yellow except for my first bathroom trip in the morning. In the morning it's usually slightly darker. When it gets medium to dark yellow and smells like pee, I I usually have a UTI.

Great to see you got your channel back.