I usually walk at lunch, but since it's so freakin cold out today, I decided to walk the stairs in my office building. There are only 5 floors, so that means there are only 4 flights of stairs. I went from first to fifth and back down 5 times. I started out running but soon slowed because I was very out of breath and my legs felt like noodles. My question is does this qualify as HIIT? I'm pretty out of shape, I know.
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