
Core Dynamics Staff
Jim O’Hagan
Owner/Head Fitness Coach
After struggling to find a facility that met his expectations Jim opened Core Dynamics in January 2006. “The fitness industry is constantly being devalued due to poor management and a lack of serious professionals, which lowers a members expectations of their fitness experience. People are led to believe that what makes a great fitness club is the size of the facility and how much equipment you can fit into it. I believe there are many factors that go into a great club… but it all starts with a great staff”. With a degree in exercise science, countless certifications and almost 30 years of experience, Jims’ passion for knowledge, along with his desire to assist people in reaching their fitness goals continues. “Strength for Life is more than a company slogan for me…it’s a philosophy that guides me every day."

Ann Meras
Manager/Program Director
Manager/Group Fitness Instructor
Ann owned and operated Manhattan Body, Inc., an exercise studio on New York City’s Upper East Side between 1983 and 1996. She is author of the book Thighs to Die For and inventor of the Focus Weight. She served as the Fitness Coordinator for the Norwich Inn & Spa and was the exercise Consultant for a series of Time-Life Books on Fitness, Health & Nutrition. Ann has worked as a fitness instructor for Core Dynamics Gym since 2008. She became manager in October of 2016.

Didi Frizell
Fitness Coach
Didi has been in the business of “fitness” for over 25 years. She is a Certified Fitness Strength Coach (CFSC) and Functional Movement Specialist (FMS). Didi enjoys working with people of all ages to help them adopt a healthy lifestyle and achieve greater fitness levels. “I get great satisfaction in helping my clients reach their personal health and fitness goals through a tailored, progressive program that creates balance and harmony in their daily lives".

Robin Bush
Group Fitness Instructor/Fitness Coach
Intensity, challenge and pushing others towards their goals have been Robin’s focus over the course of her 30+year career in the fitness industry. Robin calls Core Dynamic’s her home. There’s such great camaraderie between the members and the staff of Core. It’s a boutique studio style gym and the members’ needs are always the primary focus. Robin enjoys working with individuals and creating personalized fitness programs. She puts an emphasis on strength training in her programming. “As we age, the need to build muscle and strength becomes more and more imperative. Women especially, should never be afraid to build muscle, as it is the fountain of youth". Robins’ favorite class to teach is “Core, Cycle and Strength”. The intensity of cardio intervals on the bike is a perfect complement to the strength training that is done off the bike.

Elizabeth Falkowski
Owner and Instructor of Water Mill Pilates
Elizabeth began her study of Pilates through her classical ballet training and discovered its amazing benefits for injury prevention and rehabilitation. Elizabeth holds a BA in Dance Movement and Health Promotion from Mercy Hurst University. Her studies in anatomy/physiology, nutrition, sports and health psychology, as well as body mechanics, have allowed her to meet the individual needs of her clients and bring a holistic approach to fitness. Elizabeth received her classical Pilates certification through Power Pilates NYC Elizabeth opened Water Mill Pilates, located in Core Dynamics Gym, in 2007. Elizabeth’s dedication to a healthy, balanced life, along with her understanding of movement in the body, drives her passion for teaching.

Alexandra Maroudas
Massage Therapist
Alexandra graduated from the Swedish Institute College of Health Sciences. She has been practicing massage therapy for over 23 years. Her approach to a massage session involves a holistic integration of various modalities such as Swedish massage, Deep tissue massage, Trigger point, Myofascial release, Cupping and Reflexology.
"Every client is unique and I plan each massage to reflect their needs". Her goal is to bring you to an optimal state of wellness and relaxation. "I am extremely enthusiastic about the opportunity to help you achieve your wellness goals."

Ansley Quiros
Fitness Coach
With over a decade of hands-on experience in the fitness industry, Ansley bring passion, discipline, and purpose to every client he works with. As a NASM-certified personal trainer and former 4-year varsity athlete, his foundation in performance and training runs deep. "For me, fitness is more than just a workout—it's a long-term investment in yourself. My mission is to push you, support you, and help you unlock your full potential both inside and outside the gym."

Jim MacWhinnie
Fitness Coach/jiu-jitsu Instructor
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Jim has been in the fitness industry for over 20 years. He holds a master’s degree in Sport Management from Adelphi University and is a NASM Certified Personal Trainer, Performance Enhancement Specialist, and Corrective Exercise Specialist, with additional certification through the Titleist Performance Institute (TPI). A lifelong competitive athlete, Jim is an Ironman finisher, Boston Marathon qualifier, and top age group finisher in numerous road races and triathlons. Jim is also a Brazilian Jiu-Jitsu Black Belt, competitor, and coach. His approach to training is grounded in what he has lived: sustainable performance built for the long game.

Kevin Piedra
Fitness Coach/Stretch Therapist
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As a NASM Elite Trainer and Corrective Exercise Specialist, Kevin leverages a background in competitive sports to optimize how his clients moves, recovers, and performs. He specializes in body composition and functional strength, utilizing certifications in sports nutrition and mobility to build muscle while fixing underlying imbalances. "My 360-degree approach ensures that every session goes beyond the sweat to create a physique that is as resilient as it is strong".

Stephanie Balabanick
Fitness Coach
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Stephanie has been working in the fitness industry for over 20 years, beginning her career with a degree in Fitness Specialist and Nutrition. She is certified through NASM as both a Personal Trainer and Group Fitness Instructor, and she continued to expand her expertise with additional certifications in Yoga, Pilates, Barre, Corrective Exercise, and Stretch Therapy. "I’m truly passionate about helping people improve their health and fitness, and I find it incredibly rewarding to support clients as they build strength, gain confidence, and reach their goals."
