David Barton Presents

GYM U NYC

Our Trainers

MARIO KASSIS

MARIO KASSIS

Mario believes great physiques are built through consistency—not shortcuts.

With more than 14 years of experience in the fitness industry, he has dedicated his career to helping clients build strength, develop lean muscle, and transform their bodies through intelligent programming and disciplined coaching. As a competitive bodybuilder, he understands firsthand the commitment required to achieve exceptional results.

Every program Mario designs is tailored to the individual, combining proven strength and conditioning methods with the accountability needed to create lasting change. His philosophy is simple: real transformation begins the moment you decide to commit.

Highlights

  • 14+ Years Coaching Experience 
  • Competitive Bodybuilder 
  • Strength & Conditioning 
  • Muscle Building & Body Transformation 

Philosophy

"Nothing changes if nothing changes."

Additional Languages: Arabic

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