“I’ve never once had to explain that [it’s] is not what it was in the ’80s to someone my age,” the 22-year-old granddaughter of the founder — who now leads classes her…{ai:summary}<p>Please paste the article text or share a link, and I’ll summarize in two brief NY Post–style paragraphs (under 280 chars) with one relevant hashtag.</p>

Exclusive | This ‘80s workout is the antidote to uber-competitive fitness culture —and it’s making a comeback with Gen Z and millennials

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