Priority Fitness is a private, appointment-only training studio at 339 5th Street in Park Slope, Brooklyn, and we're built for people who are serious about the long game. We operate across three tracks: in-studio personal training and assisted stretching for functional longevity and strength, remote endurance coaching for endurance athletes of all kinds, including runners, triathletes, and cyclists, and a clinical Performance Lab powered by Korr Medical Technologies. No crowds. No guesswork. Just expert coaching built around your body.
In-Studio Training
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Private, appointment-only personal training in our Park Slope studio.
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One-on-one and buddy sessions tailored to your goals, movement history, and life stage.
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Strength & conditioning programming for athletes with specific performance goals.
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Assisted stretching to restore mobility, reduce chronic tension, and extend range of motion.
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Sessions designed for injury rehab, functional movement, and long-term strength and capability.
Endurance coaching
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Remote, high-performance coaching for all endurance athletes, including runners, triathletes, and cyclists.
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Custom training plans built and managed through TrainingPeaks.
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Metrics, video analysis, and consistent communication.
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Coaches who have competed at the pro level: USAT Pro, Team USA, NCAA Division I.
Performance Lab
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Clinical VO2 Max testing powered by Korr Medical Technologies, the gold standard in metabolic science.
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RMR testing to measure exactly what your body burns at rest.
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Running gait analysis to identify movement inefficiencies and reduce injury risk.
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Available to athletes and non-athletes alike. Our data systems are designed for performance and longevity.
A PRIVATE PERSONAL TRAINING STUDIO
Built for the Park Slope Community
Performance Lab
VO2 Max Testing • RMR Testing •
Running Analysis
Your Performance Destination.
Our Park Slope testing suite gives you a clear picture of your physiology: what your body burns, how it performs, and how it moves. From athletes dialing in their training zones to anyone seeking real answers about their metabolism, we bring the highest precision data to Brooklyn, anchored by VO2 Max testing powered by the gold-standard Korr metabolic system.
In-Studio Training
Personal Training • Strength & Conditioning • Assisted Stretching
Your Neighborhood Home Base
We believe that everyone deserves a place to move safely and effectively. Whether you are rehabbing an injury, navigating a health challenge, or building a foundation for the next twenty years, our private studio provides the quiet and personal attention you need. This is a dedicated space in the neighborhood where your consistency turns into long-term health and movement that lasts.
Endurance Coaching
High-Performance Coaching • Custom Training Plans • The Squad Community
Your Endurance Hub.
Whether you're training for your first half-marathon or preparing for an Ironman, our remote endurance coaching provides the comprehensive support you need to reach your goals.
Led by top athletes and anchored in competitive experience, we provide expert coaching designed to help you conquer the long distance. Join The Squad, our local community of athletes, and find the momentum to chase your next personal best.
From our community
Knowledgeable, warm trainers who've helped me improve my fitness, balance, and strength. This place is a neighborhood gem.
Ginny
I can’t help but take a bit of time to tell you how much it means to me to work with Liz. I’m sure you know that she is exceptional, really extraordinary. I value her levelheaded and determined approach to provide the best, safest and most effective workouts. I am not an easy person to work with. I am older, a bit grumpy and have several injuries. She works to find alternatives to help me achieve my goals. She watches me like a hawk to avoid injuries. She is consistently polite and friendly. I couldn’t ask for anyone better.
Thank you so much for the wonderful experience at Priority.
Dave
Ben and Priority Fitness have changed my fitness life! I have been a runner for twenty years, but strength training with Ben the past two years has taken my running power to a whole new level. I feel strong, fast, and confident in a way I never have before. Ben is so knowledgeable about all things fitness, and comes up with unique strength routines tailored for the individual. He is also so patient and supportive and works with you to meet your goals. The studio is a great space, and has everything you need for training. I can't recommend Priority Fitness enough!
Maya
Can't say enough about these folks! After joining *and* canceling gym memberships for years, the Priority trainers have kept me positive and working toward making better choices. These guys rock!
Laura
FAQ
These are the questions we hear most from people who are new to the studio. For everything else, from booking details to what to expect from each service, visit our full FAQ.
Of course! While we train competitive triathletes and runners, the majority of our clients are Park Slope neighbors focused on functional longevity. Whether you are 25 or 105, we apply the same scientific precision to help you move better in your everyday life.
No. We are a strictly appointment-only studio. There are no monthly membership fees or "open gym" access. You only pay for the sessions and testing you schedule.
Yes. We specialize in working with special populations and individuals returning from complex injuries. Our founder Ben Kessel (CSCS) as well as some of our certified trainers, are specifically trained to prioritize biomechanics and functional health to ensure your training supports your long-term recovery and safety.
We invite you to start with our Introductory Personal Training Session. This allows us to assess your baseline movement, discuss your goals, and ensure we are the right fit for your training journey.