Water plays a crucial role in every function of the body. More than half of our weight is water, as is 90% of our blood, and 75% of our brain and muscles. Water is the most important element, after air, for our survival.
How can we tell if we are dehydrated?
If your mouth is dry and your tongue is sticky, if you get tired as soon as you start a physical activity, your reflexes are reduced, you find it hard to concentrate and you lose your temper at the slightest thing, then you are probably dehydrated. Dehydration - fluid loss of more than 1% of your weight - is caused either by not drinking enough water or by losing too much fluid, e.g,
Does feeling thirsty protect us from dehydration?
When you are thirsty, your body has already lost fluids (through sweat, breath and urine) ranging from 0.8-2% of your weight. In other words, you are already mildly dehydrated. It is therefore advisable to drink water during the day, without waiting for the "signal" of thirst. It is also better to drink water at room temperature rather than cold, because cold water satisfies the feeling of thirst more quickly, so you drink less.
Source: ygeiamou.gr
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