Private gymnastics club membership. Think of them as your adoptive gymnastic parents.

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Tape. This is used to keep your bones, body, and uniform snugly where they're supposed to be.

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Uniforms. Sweatpants will not be a suitable alternative.

Medal Polish. This is pretty self-explanatory. It's for all the wins you're going to rack up.

Just don't use this kind. (Source)

Chalk. Because slippery ain't safe. (Source)

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Deodorant. Be a champion. Even when you lift your arms in victory and salute the judges.