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Calum Marsh is a writer, reporter, and editor who specializes in art, culture, and sports. A regular contributor to The New York Times, his writing has also appeared in The New Yorker, The Guardian, The Atlantic, Playboy, Esquire, GQ, The New Republic, and New York Magazine, among others.
He was a long-time critic with The Village Voice and served as the managing editor of SHARP, Canada’s leading men’s magazine. His long-form profiles and interviews have appeared in The Times, Vulture, and elsewhere. His criticism has appeared in Pitchfork, The AV Club, GameSpot, IGN, Sight and Sound, and Film Comment.
His book The Glass Box: The Shocking True Story of How CrossFit Broke the Rules, Made Millions, and Changed Fitness Forever released by HarperCollins worldwide on October, 2026. The Glass Box is a page-turning and upsetting look at CrossFit—one of the most popular fitness programs in the world—and at its divisive founder, Greg Glassman. It is both a thorough history of a company’s rise and an eagle-eyed examination of what happens when a visionary idea marches headlong toward global expansion.
CrossFit is a phenomenon, but the company’s culture of unapologetic machismo, and the sometimes reckless behavior of Glassman and his cronies, repeatedly put the brand, and its founder, in the hot seat—until one careless mistake too many brought the empire crashing down.
Find Calum at-
Amazon- The Glass Box: The Shocking True Story of How CrossFit Broke the Rules, Made Millions, and Changed Fitness Forever
https://www.calummarsh.com/
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