“You’re not alone.
Going up stairs is a burst (of) activity and uses many muscles in your body.
Your body needs a suddenincrease in oxygen, so heavy breathing is normal,” she explains.
(If you’re dealing with moreconstant chest tightness, here’s what could be going on.)
You don’t warm up before taking the stairs.
When you work out, it usually takes a few minutes to get things going, right?
When you bound up the stairs, you’re not doing any prep work to get warmed up beforehand.
Stairs use many muscle groups.
Simply put, it’s because going up stairs demands a lot of your muscles.
“Climbing a flight of stairs uses more muscles than walking,” explains Kennihan.
“You are basically doinglungesuphill and fighting against gravity.
Stairs require a different throw in of energy.
(If you want to train stairs specifically, try thesestair-climber exercises from Blogilates creator Cassey Ho.)
TL;DR: There are better measures of your fitness.
What’s more meaningful, experts say, is how long it takes you to recover.
