>the minimum age to participate at any swimming event at the World Aquatics Championships is 14
>however, younger ages are permitted, as long as you meet the minimum time threshold at the trials
>12-year-old Yu Zidi became the youngest swimmer to medal at the World Aquatics Championships on July 31 in Singapore
>American swimmer Alex Walsh called Yu "phenomenally talented" with a "really bright future" ahead of her
>Yu's success at such a young age has sparked some controversy about the impact her training will have. On BBC Radio 5 Live, four-time world champion swimmer Karen Pickering called her success "astonishing" but expressed concern for how hard the girl is training.
>"To see a youngster go in the events she is doing is on the one hand astonishing, but it does slightly raise the question of how long has she been training hard?" Pickering said

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