There are lots of famous debates about what people in different regions call different things, like "soda" versus "pop" and "sub" versus "hoagie." One of those debates is really heating up this week.

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What do you call the shoes you wear when you exercise?

According to a study by Harvard, 45.5% of people call them "sneakers" and 41.3% call them "tennis shoes", the rest use other terms like "gym shoes" or just plain "shoes."

Apparently, though, LOTS of people had no idea there was any other term than the one they used, so the reactions on social media are trending toward disbelief.

Read more at USA Today.