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I don't see a lot of difference between drinking few sips and 1 cup (8 oz, 237 mL) of water at once. If you drink a large amount of water at once, for example, 500 mL (2 cups, 16 oz), all this water will be quickly absorbed and will expand the blood volume. Volume receptors in the heart will detect an increase of blood volume and will trigger excretion of ...


6

While coffee in large amounts can stimulate urine production, it's not enough to produce a dehydration effect, especially in people accustomed to drinking caffeine. This recent study compared 50 male coffee drinkers in short trials both with and without caffeine, and concluded that in coffee accustomed males, coffee had much the same hydrating effects as ...


6

OK, so this seems to be a 24 hour fast. Salt (sodium) and glycerol, after drinking water, prolong the time in which the water is excreted from the body, but they both work only for few hours. The idea of hyperhydration to delay dehydration sounds interesting for marathon runners (in order to avoid the need to drink during the race), but according to ...


4

Skin becomes a better conductor of electricity in response to physiologically arousing stimuli which can be external or internal. Increased sweat increases skin conductivity. This is known as the Skin Conductance Response (SCR) - also known as the Galvanic Skin Response (GSR). (See this Massachusetts Institute of Technology faq page). Another name for GSR is ...


3

Your body should tightly control the water concentration (osmolality) via sensors in the brain (osmoreceptors) which send chemical signals (vasopressin) to the kidneys. These receptors are very sensitive and are capable of making you thirsty with only 1% dehydration. So a normal person drinking extra water will just make more urine and pee it out. An ...


3

The feeling of dehydration may be due to dry mouth, for example, due to stress related to getting up early. Feeling unrefreshed due to lack of sleep may also make you feel dehydrated. But this is not dehydration. When you are actually dehydrated, you lose body weight. It is considered that you are mildly dehydrated when you lose at least 1% of body weight, ...


3

In water intoxication, cells do not burst but swell. This can lead to swelling of the entire organs; the most dangerous is brain swelling, which is the usual cause of death. Transitional cell or organ swelling is not already a damage. Brain swelling is different because the swollen brain presses hardly against the skull, which can cause damage. When you ...


2

The article linked from the question mentions several benefits of coconut water, such as high mineral content, antioxidant activity, preventative effect against diabetes, kidney stones and high cholesterol levels. It is clearly said in the article that the evidence comes from animal studies and that they haven't found any human studies that would confirm ...


2

The claim that "water is not close to an optimal hydration solution because it goes right through you into the urine" is grossly exaggerated. Water is just good for hydration; even if somewhat more effective beverages are available, they are not really necessary for everyday needs. Sugars speed up water absorption. Fructose stimulated 66-100 per ...


1

No, because activity as a feature is too highly variant and there are probably a lot of other factors that would go into a formula like this. If you do a bit of research you will find that there are guidelines of fluid intake per day for certain groups of patients, e. g. in intensive care, dialysis patients,...: https://www.ncbi.nlm.nih.gov/pubmed/?term=...


1

When hydrating, it is important not only to consume enough fluids, but also to ensure that you are replenishing electrolytes and minerals in your body. This will help you to hydrate yourself more quickly and sustainable than simply drinking lots of water. Here are my suggestions: Sports drinks like Gatorade contain electrolytes and will hydrate you more ...


1

Asking about "any health benefit" is perhaps too broad to receive a complete answer. However, several articles address the issue of water temperature and rehydration. Two studies have shown that when you are in a state of dehydration (in these studies, after physical activity), the optimal drinking-water temperature in terms of good hydration and lower ...


1

Treatment is usually fluid restriction, treating underlying problem and diuretics or other medication for fluid and electrolyte imbalance, so you could do a fluid restriction at home. However, the causes of overhydration usually are renal, heart or liver problems, hormonal disorders and increased fluid intake. So you can't just treat all that, when your ...


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