David Barton Presents

GYM U NYC

Our Trainers

MARIO KASSIS

MARIO KASSIS

With over 14+ years of experience in the fitness industry and a certification as a personal trainer, Mario specializes in strength and conditioning programs designed to help people build significant muscle mass and transform their physique.

As a competitive bodybuilder, he understands the dedication and expertise required to achieve exceptional results. Mario is passionate about guiding individuals in reaching their fitness goals through personalized training and support. Ready to take your fitness journey to the next level? Start today with Mario and achieve the results you've been working towards! Nothing changes if nothing changes.

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