See What Sets Us Apart
Built for Your Freedom
At CoreFitnessNYC, we believe personal trainers deserve more than just a gym—they need a space to thrive. We’ve created a premium, trainer-first environment where you control your schedule and success.
No unnecessary rules or restrictions—just a professional space to elevate your career. Whether growing your client base or delivering exceptional sessions, we provide the freedom and tools you need. Join us and take your training business to the next level.
Meet the Founders
Michael Margulies, co-founder of CoreFitnessNYC, brings over 30 years of experience as a trainer and competitive athlete. He’s competed in bodybuilding, powerlifting, triathlons, marathons, and is trained in Brazilian jujitsu and boxing. Michael believes in evolving, personalized fitness that adapts to each client’s unique goals and challenges.
He has worked with everyone from first responders to CEOs and celebrities, building a reputation for results-driven training. Michael also partners with physicians to ensure clients recovering from injuries or health conditions can train safely and effectively.
At Core, Michael fosters a supportive, distraction-free space where trainers and clients grow. He’s passionate about helping people move better, feel stronger, and live healthier. Whether starting out or aiming higher, Michael’s expertise and commitment can guide you toward lasting progress and real transformation.
Denise Margulies, co-founder of CoreFitnessNYC, is a passionate runner, coach, and motivator with deep roots in endurance training. A veteran of nine marathons—including Boston, NYC, and Honolulu—she blends real-world athletic experience with an inspiring, no-nonsense approach. Denise empowers her clients through structured training that focuses on strength, balance, and mindset.
As a mother of two, Denise brings warmth and authenticity to every session, particularly in helping women discover their inner strength and potential. Her coaching isn’t just about running farther—it’s about building confidence, resilience, and lasting wellness.
Whether you’re a beginner or seasoned athlete, Denise’s personalized coaching style and competitive edge will help you go beyond your limits. Her new passion for cycling brings fresh energy to the Core community, and she’s ready to help you achieve goals you never thought possible—one powerful step at a time.
What Makes Us Different
- Keep a bulk of your earnings—no revenue share.
- Book sessions when it fits your schedule.
- Impress clients with a clean, professional atmosphere.
- Access premium equipment and functional space.
- Be part of a supportive, trainer-only environment.
