
How CrossFit Became a Billion-Dollar Fitness Empire with Calum Marsh
Greg Glassman gave CrossFit away for free, turned down every investor, and charged $500 for anyone to put the name on their gym door. It became the most valuable fitness brand on earth. In this episode, John sits down with Calum Marsh, journalist, New York Times contributor, and author of The Glass Box. They dig into how a personal trainer turned free online workouts into thousands of gyms and $80 to $90 million a year without a single investor. Calum shares how one sales lesson, always chase a no, helped him land Glassman after years of emails. They also break down why CrossFit built super fans while other fitness brands built fads, and why leaders need people who push back. If you’re a founder building against the playbook, a sales leader trying to turn customers into advocates, or a rep working a prospect who won’t respond, this conversation is for you. You’ll hear why giving away value grows a brand, how persistence earns trust, and why you need to know why a rule exists before you break it. Want to build a sales team that can hold its own in the AI era? Visit https://www.jbarrows.com and learn how you can Make It Happen. What You’ll Learn How “always chase a no” and specific, persistent outreach can earn trust from a prospect who has every reason to ignore you Why giving away your best content for free can build a bigger business than gating it How CrossFit turned customers into super fans and grew without ads, commercials, or investors Why leaders who push out everyone willing to disagree end up surrounded by yes men Why you should understand why a rule exists before deciding to break it Calum Marsh is a journalist and the author of 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 27th, 2026. He is a writer, reporter, and editor who specializes in art, culture, and sports, and a regular contributor to The New York Times, with writing that has also appeared in The New Yorker, The Guardian, The Atlantic, Esquire, GQ, and New York Magazine, among others. He is also the author of True Lies: The Art of Reality Television. Born in the UK and raised in Southern Ontario, he worked in B2B sales before building his career as a professional writer. Connect with Calum Marsh: LinkedIn: https://www.linkedin.com/in/calum-marsh-26ba3335/ Instagram: https://www.instagram.com/calummarsh Email: calummarsh@gmail.com Learn More About Calum Marsh: Website: https://www.calummarsh.com/ Get The Glass Box: HarperCollins: https://www.harpercollins.com/products/the-glass-box-calum-marsh?variant=44746345906210 John Barrows is a sales trainer, speaker, and founder of JB Sales with over 25 years of experience in the industry. He has made hundreds of cold calls a week, led startups to acquisition, and trained high-performing teams at companies like Salesforce, LinkedIn, Amazon, and Okta. Through JB Sales, John focuses on practical sales execution, helping reps fill pipeline, close deals, and build trust with buyers in today’s AI-driven sales environment. Connect with John Barrows: LinkedIn: https://www.linkedin.com/in/johnbarrows Instagram: https://www.instagram.com/johnmbarrows TikTok: https://www.tiktok.com/@johnmbarrows Check out John’s Membership: https://learn.jbarrows.com/pages/individual-packages Join John’s Newsletter: https://www.jbarrows.com/newsletter






