DENVER (AP) — Stranded at home amid pandemic lockdowns in spring 2020, Emma Warford stumbled down a social media rabbit hole in her quest to get in shape. Viral 28-day fitness challenges. YouTubers promising “hourglass abs.” Diet videos where slim-stomached influencers peddled calorie-tracking apps.

Warford, then a 15-year-old starting volleyball player, bought a food scale and began replacing meals with energy drinks hawked by social media stars.

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