Founder Julien Berthier

ulien Berthier is the founder of Phitnix (phitnix.com), a gamified fitness coaching platform that helps independent personal trainers digitalize and scale their business. With a background in sports coaching, education, and web development, he specializes in making fitness training more engaging through game mechanics — think Duolingo, but for strength training and personal coaching. Based in France, Julien has firsthand experience building a fitness-tech product from scratch as a solo founder. He can speak to: How gamification drives client retention in fitness programs The digital transformation of the personal training industry Building fitness apps and platforms as an indie developer Nutrition strategies for bodybuilding and strength athletes The business of personal training in E...