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Meet the Team

Fredrick Hahn

Fredrick Hahn, Owner and President

Fredrick Hahn is a certified personal trainer by the American Council on Exercise since 1990 and has been instructing 9 to 90 year olds for over 20 years. He instructs some of the world’s most prominent business men and women and celebrities in the world.

Since 1998, he’s owned and operated SlowBurn Personal Training Studios located on the Upper West Side of Manhattan and in Montclair N.J. He is the co-author, along with Drs. Michael and MaryDan Eades of the best-selling fitness book The Slow Burn Fitness Revolution (Random House 2003) and is the author of Strong Kids, Healthy Kids (AMACOM 2008)

Fred has appeared on numerous television and radio shows including NBC’s The Today Show, CNN’s The Biz, The 700 Club, WABC Morning Show, NBC Live at Five, Fox Five News, ABC Eyewitness News and much more.

Tommy Day

Tommy Day

As a lifelong athlete (NCAA football, track and field, gymnastics) and as a trainer since 1991 (SFPA certified), I have had the opportunity to experience many different training techniques. For best results, my standard workout usually hovered around two to three hours (weights, cardio, stretch, shower), four times a week. If I did any less I felt I would be short-changing myself. Boy, was I wrong. I get the same results doing SlowBurn™ as I did before, and I don't have to organize my life around my workout! I love what SlowBurn™ does for my body and I love seeing what it does for our clients.

Ariel Davies

Ariel Davies

Ariel has always lived an active and healthy lifestyle and has been an ACE certified personal trainer for the past couple of years. He's been fortunate enough to discover The SlowBurn method and has taken full advantage of the opportunity. Now, he works out to complete fatigue in just a matter of minutes instead of spending hours in the gym 6 days a week like he used to. This leaves him with more time to do the things he loves like swimming, yoga, and hiking.

Jake Ditkoff

Jake Ditkoff

Jake Ditkoff is an American Council on Exercise certified personal trainer. He is a recent graduate from Rutgers University, where he majored in Psychology. Jake is passionate about helping people achieve their fitness goals and maximizing their potential. He is enthusiastic about the effectiveness and expedience of the SlowBurn method in his own life, and looks forward to sharing it with you!

Nio Vezdeni

Nio Vezdeni

Nio is a certified exercise instructor and experienced client services concierge. She hails from the country of Georgia who also holds a doctor of dentistry degree. She enjoys fitness, strength training and helping clients achieve their best possible self.


Kate Flanders

Kate is a NASM certified Personal Trainer with a masters in education. She taught elementary and middle school students for several years before pursuing fitness professionally. Kate has developed and maintained her love for fitness through CrossFit, running, strength training and competing in triathlons with her father.

Kate enjoys the process of connecting with and supporting others on their fitness and wellness journeys. As a trained educator, she considers herself to be a lifelong learner, and routinely seeks out new educational opportunities.

Mona Maharaj

Mona Maharaj

Mona is a passionate educator, personal trainer, and tennis coach with over 30 years of experience working with children and adults of all ages and fitness levels, including special populations. She is skilled in differentiated instruction, assessment and modification, and designing and implementing personalized training programs to help my clients achieve their fitness goals.

Education: B.A. Montclair State University

Certifications include: NASM Advanced, A.C.E., Olympic Weightlifting Coach, IYCA, Post and Pre-Rehab. Basic Life Support Instructor.

George Ruthauser

George Ruthauser

George is a certified personal trainer through the National Academy of Sports Medicine and holds an MBA from Fairleigh Dickinson University. He has been dedicated to his personal fitness goals for over a decade. He believes that almost anything is attainable if you take a positive and reasonable approach.

Prior to launching his career as an exercise instructor, George had a 30-year tenure as Vice President of Sales at GRM Document Management, a global document management company that works with a wide variety of industries. Before that, he was a Vice President, Management Supervisor at Grey Advertising, overseeing strategic campaigns for major brands such as Kool-Aid and Red Lobster.

A lifelong lover of the arts, George has also written several plays — five of which have been produced in one-act festivals in New York City. He lives in Cedar Grove, NJ with his wife and daughter.

Adjunct Support Services


Leigh Hansen, Massage Therapist

Founder of Remedy Massage, Leigh has been helping her clients reduce stress and release muscular tension for the last 15 years. She received a BA in Dance from NYU in 1991 and performed and taught for several years. In 1997, she became a certified Gyrotonics instructor and began training clients while pursuing graduate studies in both dance and pre-med. Leigh received her Massage Therapy degree from the Swedish Institute in 2002 and opened her private practice that same year. An avid fan of the SlowBurn system, Leigh is grateful to the trainers at SlowBurn for helping her stay strong!

Montclair Backrub

Contact Information

NYC Location
169 West 78th Street
New York, NY 10024

[email protected]

Montclair, NJ Location
25 Watchung Plaza
Montclair, NJ 07042

[email protected]

As Seen On

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