Hydration and the body — Health, 11–13 years
How water helps the body work, and how to notice when you need more. Health, 11–13 years.
What hydration does
Your body uses water to move nutrients, cool itself through sweat and make urine. You lose water by breathing, sweating and going to the toilet, so drinks and water-rich foods replace it. Thirst is one useful signal, but heat and exercise can make you need more before you feel very thirsty.
Why it matters
People once had no easy way to carry clean water, and illness or hard work could remove a lot of fluid. Understanding hydration helps explain tiredness, headaches and poor concentration without treating every problem as a lack of water. The aim is enough water for the situation, not drinking as much as possible.
A hot football practice
Maya has football practice for 60 minutes on a hot afternoon. Before starting, she drinks some water; during breaks, she checks her thirst and drinks again, then has water with her meal afterwards. If she feels dizzy, confused or unusually weak, she stops, tells an adult and moves somewhere cool instead of simply forcing herself to continue.
The trap: clear urine all day
It is tempting to think that completely clear urine proves you are being healthy. Urine colour can change for many reasons, and forcing down large amounts of water is not a goal; too much can also be harmful. Use thirst, the situation and how you feel as clues, and ask an adult or health professional when symptoms worry you.
Where it helps
Hydration matters on long walks, during sport, in hot weather and when you have a fever or stomach illness. A reusable bottle can make water easier to remember, but it is not a magic rule that fits every person or day. In serious illness, follow the advice of a parent, doctor or pharmacist.
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