10 Facts About Boobs You Never Knew, You Boob

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5. Breasts Move 8 Inches During Running
When a woman runs, her breasts move in a figure-eight shape that can cause breasts to shift up to eight inches while you move. Because they are not just bouncing up and down, a sports bra with individual cups is the best way to support breasts during exercise.

Fun fact:┬áMore than 49,500 people search for “bouncing boobs” per month on Google.