Even moderate dehydration (lack of water) can reduce clear thinking, American scientists warn.
Mild to moderate dehydration leads to impaired attention and difficult decision-making, writes the journal "Medicina, nauka, sports, experience".
The scientists found that dehydration especially caused problems in tasks that require attention, motor coordination and so-called executive function, which includes, for example, navigating maps, spelling, calculating or correcting texts.
Physical fitness is called into question when a person loses two percent of body mass, especially after exercising in a warm environment.
Scientists investigated what then happens in the brain with an equal loss of fluid.
The negative effects were not dramatic, but they grew with increasing lack of water in the body.
Common symptoms of dehydration are weakness, muscle weakness, decreased urine output, and confusion.
You should not take too much water and go to the other extreme, because then a dangerous condition can occur - hyponatremia.
Scientists say that it is necessary to monitor the color of urine - it is very light if too much fluid is ingested, and intense and darker yellow if the urine is dehydrated, Nezavisne reports.
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