The Studio at D3Fitness

Central Jersey we are here! Our Boutique Fitness-Yoga Studio & Juice Bar, nestled in the heart of the South Avenue District right near the historic neighborhoods of Netherwood and Sleepy Hollow. We bring that personal, high end appeal to a generic fitness studio market. Our goal isn't only the maintenance & development of your overall well-being, but that your every visit is an amazing experience.

Donnie DeMary


Corrective Exercise Specialist

Post-Rehab Specialist

Certified Personal Trainer

Donnie has been in the fitness industry and Public Health arena for over a combined 30 years. He is the owner of The Studio at D3Fitness LLC, a boutique fitness & yoga studio located in New Jersey. He is also the Founder/Executive Director of D3Fitness Integrated Wellness LLC, a Public Health consulting firm.


DeMary served honorably in The United States Marine Corps from 1990-94 operating in global theaters such as Somalia and The Middle East. DeMary has extensive experience within the health, fitness, and physical therapy (over 200 clinical hours) arenas.


He has been committed to our communities as well as our youth. From the annual Community Thanksgiving Dinner, Christmas Toy & Coat Drive, to his mentorship programs for our youth, service to those in the community is his passion and purpose.



Our Team.