Why do we breathe harder when we climb stairs?
Oxygen Rush
Why do we breathe harder when we climb stairs?
You take the stairs two at a time, and halfway up your chest starts pumping like a drum. Your legs are fine — so why are your lungs suddenly working overtime?
Every move you make — lifting your arm, blinking, even thinking right now — costs energy. Your body burns fuel to make that energy, and that fuel is a tiny sugar called glucose floating in your blood. But glucose can't burn without oxygen, just like a campfire can't burn without air.
