Mind Pump: Raw Fitness Truth 2815: Mark Mastrov Sold a $1.7B Gym Empire… Then Bought It Back
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Mar 16, 2026 
Mark Mastrov, founder of 24 Hour Fitness and serial fitness entrepreneur, reflects on rebuilding brands and scaling gyms. He discusses reacquiring 24 Hour Fitness, reviving Crunch through restructuring, franchising UFC Gym globally, and modern trends like recovery tech, MediSpa services, and Gen Z training preferences. He also covers leadership, marketing shifts, and rebuilding personal training and community in clubs.
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Gyms Evolving Into Medical Wellness Hubs
- Gyms are becoming wellness hubs combining MediSpa services, peptides, NAD, IV therapy and recovery tech alongside strength training.
- Mastrov's test club in Vegas prototypes hyperbaric chambers, GLP-1 support and private showers as the future mix.
Gen Z Is Shifting Gyms Toward Strength
- Gen Z drives equipment and layout trends: they prefer free-weights, power racks and social-friendly spaces, shifting clubs from cardio-centered to strength-focused.
- Mastrov says ~40% of new gym joiners are Gen Z and they want visible, shareable training zones.
Hire Trainers And Use Trials To Convert Members
- Rebuild personal training as a revenue and retention engine by staffing trainers and offering trial sessions to convert members.
- Mastrov highlights a club doing 3,500 workouts daily with only one trainer doing $13k PT a month as a missed opportunity.