Spend a day at thebeachswimming , play volleyball game , or participating in any other physical bodily process , and you ’ll no doubt be wash up by the end . But spend the entire time lounging around , and you might find yourself just assleepy .

Why does your body get so tired from plainly being in a hot spot , even if it ’s doing basically nothing else ?

Because , as Live Scienceexplains , it ’s actually doing a lot . Your body is always trying to maintain your interior temperature — and when you ’re surrounded by heating plant , that requires significantly more effort .

This can’t be comfortable.

One vital way of life your body cool down you off is by dilate your stemma vessels , calledvasodilation . Not only does this increase blood flow , but it also helps origin get close to the skin , where it can unload some excess heat . And if you reckon having a crowd of blood barreling along right beneath your skin ’s Earth’s surface seems like it might make you calculate pretty crimson , you ’re right ; plenty of citizenry get flushed when they ’re hot for this exact reason .

Sweating , the human body ’s most well - known temperature reduction mechanism , is quite confinement - intensive , too . Your marrow rate and metabolic rate both increase , burning through your Department of Energy and potentially leave youdehydrated .

“ In accession to runny loss , the loss of all-important salts and electrolytes such as potassium , calcium and atomic number 12 can also make you palpate worn out , ” Dr. Aimée Brame , a consultant physician at London Bridge Hospital , toldCosmopolitan .

For the most part , steer for avoiding heat - get fatigue are self - unmistakable : Stick to shady spots if you ’re outside , hop in a cold shower if you ’re inside , and stay as hydrous as possible . Fruits andvegetablesmake cracking bite , since they ’ll facilitate supplant lose fluid and minerals ; and a loose - meet , breathable kit will allow your skin bring out more passion than something constricting .

Now that you know how hard your body has to form on a hot day , you’re able to freely indulge in lie down around without feeling lazy .

[ h / tLive Science ]