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ABOUT US

WELCOME TO BOX-X
Guy Ambroise, owner and head coach at BOX-X Fitness in Stamford, CT

Head Trainer & Founder

TRAINER

AMBROISE

Welcome to our boxing and fitness program! I’m Trainer Ambroise, a USA certified boxing coach with over 20 years of experience. My mission is to provide a dynamic training environment where both adults and kids can discover the art of boxing while improving their fitness levels. Whether you’re looking to learn the fundamentals, get in shape, or prepare for competition at a high level, you’ll find that our program is uniquely tailored to meet your goals. Join us for an engaging and transformative experience that goes beyond traditional training—where every punch and movement is designed to empower you. Let’s step into the ring together and elevate your boxing journey!

About
BOX-X Fitness trainer leading a workout session

PERSONAL TRAINER

TRAINER

JEFFLINE

With over 10 years of experience in the fitness industry, Jeffline is a passionate and dedicated personal trainer at Box-x. Her extensive background in fitness has equipped her with the knowledge and skills to help clients achieve their goals, whether they're just starting out or looking to take their training to the next level. Known for her motivating and energetic approach, Jeffline believes in pushing clients to work hard and unlock their full potential. She’s committed to creating personalized workout plans that challenge, inspire, and deliver results. Join Jeffline at Box-x and discover what you're truly capable of!

Boxing Training

LOCATION

We are proudly located in the Glenbrook neighborhood of Stamford, inside BreakThru Family Fitness. Our space offers a focused, welcoming environment for athletes of all levels—from first-timers to competitive fighters.

Exterior view of BOX-X gym in Glenbrook Stamford, Connecticut

ADDRESS:

48 UNION STREET

STAMFORD, CT 06906

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Parking is available in either of the surrounding lots

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Questions?

Email: boxxfitnessandboxing@gmail.com

© 2025 by BOX-X

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