36

First, you won't need to make this observation if you routinely drink when you stop to rest, and if you eat something at least slightly salty whenever you snack (if your snacks include jerky or salted nuts you're more than covered.) Second, pay attention to your thirst. Many of us ignore our bodies for hours at a time - postponing bodily functions during a ...


36

This is my highly opinionated self-answer. I would be happy to see other people's answers if they disagree. The advent of bladders such as camelbaks is a response to a pop-culture myth that dehydration is always sneaking up on us -- that "thirst is too late," so we have to constantly drink water even when we're not thirsty. Actually, the first and ...


35

Some advice given to me in an outdoor leadership course: As a leader, use water bottles rather than bladders. Make an obvious show of the pausing and drinking: stopping, taking off the pack, getting out the water bottle, and drinking plenty. This is a clear signal to the clients that it's OK, advisable even, to stop and drink and do other things like rest, ...


31

Liam's right that you can't/shouldn't overhydrate, but based on my experience it's easily possible to start the day under-hydrated. Maybe you're office-bound and don't drink enough water, or you've had a spot more alcohol the evening before than you should, or too much coffee... Either way, you start walking under-hydrated, and end up drinking more water ...


28

Dehydration occurs when there is more water going out or being used than is going in. Additionally, if you're drinking too fast (more than a litre an hour for an average adult male), you're not absorbing the water and so it doesn't count as going in. Confusingly, dehydration can also be classified loss of water, loss of electrolytes or loss of both. To add ...


22

In a survival situation without water you will die in days and without food you will die in weeks. So in general, there is no need to eat in a survival situation. That said, the quick burst of energy you can gain from eating a sugary snack could make all the difference. There is probably little harm eating a little after one day without water. Your body ...


18

If you run out half-way, perhaps you should bring twice as much? That being said... One option for day hikes is to hydrate well before hitting the trail. Also, have readily available water for your return. e.g. leave a water bottle in your car. An other option is refilling from natural water sources during the trip would allow you to consume an adequate ...


18

As with any relatively unscientific field, there is a lot of lore out there that may have originally had a good scientific foundation, but the restrictions or specific conditions have long been forgotten and the answer takes on a life of its own out of context. The myth about eating snow seems to me to be one of these things. The main point is that it ...


18

The symptoms of dehydration and over-hydration are similar, and this can lead to occasional mistreatment. Symptoms common to both include headaches, confusion, loss of appetite, irritability, nausea and vomiting, muscle weakness, muscle cramps, and seizures. With the popularity of sports drinks and staying hydrated, exercise-associated hyponatremia (EAH) ...


17

The usual advice to someone in an emergency situation in the wilderness is to stay put, so that it's easier for rescuers to find you. In this situation, performance isn't an issue. There is a folk belief that "thirst is too late," and that people are commonly dehydrated without knowing it. If you believed that, then you might drink some of your water even ...


17

The main advantage of a water bladder is that it's easy to drink from. You can take frequent small sips without interrupting your activity. If tend to forget to drink enough water while exercising, this is a huge advantage. If you don't have that problem, then you get little to no advantage from a water bladder. A side effect is if you are biking/climbing/...


16

Do a google search for urine colour (or color) chart and you will find many charts showing examples of what your urine should look like when you are hydrated. or not. Here is a slightly more humourous version but shows the principle:


16

The literature is mostly pro-drinking and anti-rationing. Hopefully these sources will provide some details for you. The U.S. Army survival manual does not recommend that you drink water only when thirsty, as this leads to under hydrating. Instead, water should be drunk at regular intervals. Even in cold weather: Don't take chances with hydration. Do ...


15

I think the problem is the generalization. It depends on the food. Watermelon is surely not comparable to trail mix. Also I have my doubts about the idea that berries are a problem and a mash to squeeze out the water is better than eating them because of the skins and seeds... that makes no sense. The way your intestine absorbs water is different through its ...


14

You'd be better of strength training your muscles to carry the extra weight of the water you need to carry. How much water an individual needs to stay hydrated is not a standard measure. Different individuals need more or less water to keep their bodies properly hydrated. I don't think it's necessarily wise to try and train your body to do with less of ...


14

I actually answered a similar question over on Pets not long ago... Warm weather walkies and water... however you've asked in a bit more detail so here goes... How can I know that the dog is perfectly hydrated? The dog will refuse water given to them if they feel like they've had enough to drink - this is a slim balance especially in male dogs, as it's a ...


14

This is a known downside with water bladders. In my opinion it's the largest downside of a water bladder compared to a water bottle. You don't know you're running low on water until you're completely out, and even then it's hard to tell if you're actually out of water or if you just got a kink in the hose. The main benefit of a water bladder is that the easy,...


13

There are a lot of myths about water and dehydration: Drinking Water for Hiking: Myths and Facts. One of these is the belief that people are in danger of being dehydrated without knowing it. Dehydration is a serious medical condition that sets in long after thirst, and thirst is a powerful sensation that commands your attention. When people say casually, "...


13

The absolute best way to figure out when to drink is by paying attention to your thirst. If you drink a cup of water when you aren't really thirsty, your body will start getting rid of excess fluid within a few minutes. But if you drink that same cup when you are seriously dehydrated, you won't pee it out because your body won't have excessive moisture. ...


12

There are two types of water-based concerns while doing strenuous activity in the desert: dehydration and hyponatremia. Dehydration occurs when your body is not getting enough water, and is the most common. Symptoms include irritability, headache, lack of energy, bright yellow/orange and infrequent urine. You lose water while you sweat, but in hot climates ...


12

One advantage to bladders that hasn't been mentioned yet: the less water they contain, the less space they take up in your pack. A 1L bottle takes up 1L of space whether it's full, half full, or empty. If you have a 3L bladder but don't need to carry 3L of water, you can fill it with as much water as you need and have more space available for other things.


11

You have not provided any evidence you were actually dehydrated; it seems you only tought you were dehydrated - I assume you had dry mouth and felt thirsty. Symptoms and signs of dehydration are described here in great detail: Dehydration Symptoms and Signs. In short: thirst, dry mouth, fatigue, headache, nausea, decreased skin elasticity, dark urine, ...


11

Colour if urine is a good indicator. The lighter the colour, the better your hydration is. Once you start to feel thirsty, you are already dehydrated.


11

How much water you need depends on how big you are, how fit you are, where you are and what you're doing. For example, on Mount Everest, the average person needs to drink 4-5L of water each day just so that their body can function properly. You lose water through your breath, perspiration, urine and bowel movements. If you're a big guy that's out of shape, ...


10

Maybe not a real way to get water inside your body, but what helps with me is chew on chewing gum. It distracts from the feeling I'm thirsty or drinking too much water without really needing it. Also chewing gum is very light to take with you. Of course the gum is not a substitute for water which is needed anyway.


10

I have a very simple reasoning about it. It's only based on personal experience, so don't regard it as absolute truth. Your body needs a certain amount of water to be comfortable, say, N. Comfort here includes urination (removal of poisons from body) and sweating (removal of heat). If you drink N or more, the body will function well. If you drink less than ...


10

This seems a bit low to me, but there are lots of other factors to consider. The main ones are temperature and exertion/walking speed. Different people also definitely need different amounts of water. One of my friends was nicknamed desert-man as he drank approximately 4x as much as everyone else. If you are in the UK or a similarly cool climate, then 100ml ...


10

Dehydration in dogs is very similar to dehydration in humans. This link should give you an in depth answer. My main points are these: If the dog has a dry nose, dry gums and/or dry mouth it most likely needs water. Excessive panting is another big sign to look for seeing as that's how dogs regulate their body temperature. You should treat their dehydration ...


10

While various sources suggest drinking some blood in emergency will help, the risks outweigh the benefits. From 5 Myths of Dehydration: Sure, there’s water in blood. But whose or what’s blood are you planning to drink? Some of the traditional cattle cultures of Africa still consume cattle blood, often blended with milk. But this is done for protein and ...


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