AI Tutor
Imagine sprinting across the playground on a sunny afternoon until your cheeks turn bright red and drops of sweat roll down your forehead. Your body feels like a furnace, but you keep moving.
More than half of your entire body is actually made of water! That water travels in your blood like a busy highway system, delivering oxygen and energy to your working muscles.
Your body uses water all day long, but what makes exercise create so much heat inside you in the first place?

Your Body's Natural Air Conditioner

Whenever you run, jump, or kick a ball, your muscles work like tiny engines. Just like a car engine running fast, working muscles release extra heat that warms your whole body up.
To keep you from overheating, your body pushes warm water out through tiny skin openings called pores as sweat. When sweat hits the outside air, it turns from liquid into vapor and carries the heat away — a process called evaporation.
Sweating keeps you safe and cool, but where did all that lost water come from?

What Happens When Water Runs Low

Sweat takes water straight out of your bloodstream. When you lose more water than you drink, your body enters a state called dehydration.
Without enough water, your blood gets slightly thicker, making your heart pump much harder to deliver energy. Your muscles get tired quickly, your head might throb, and your body struggles to sweat, making you overheat.