Boston’s Most Unique Gym

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Boston’s best for personalized fitness plans that cater to your needs.


CLIENTEL3’s focus has always been to utilize all methods that can deliver results to bodies that need to utilize different stimuli than conventional methods.  We understand that everyone has a different fitness journey and sometimes conventional training methods might not be enough for you to achieve your goals. To help you attain your goals whether it’s injury rehabilitation, coming off of a procedure, returning from pregnancy or just to look and feel better, our diverse selection of specialized equipment and techniques will assist you in finding the plan that works for you!


Come See Why we are Different

Experience private one-on-one Personal training in Boston designed to fit your needs. Learn more about what we have to offer and schedule your free consultation today.

Our Unique Facilities

Proteus Motion Machine

CLIENTEL3 has one of the only Proteus Motion Machines available for public use in Boston. The proteus provides resistance in 3 dimensions To unlock the next revolution in human performance and fitness technology requires a total reinvention of resistance training.

Boutique Training Space

The training space is private offering you not only unique equipment but truly personal space. Sessions are booked by appointment only allowing CLIENTEL3 to be the safest place you can train during COVID.

Tailored Programming

Our personalized one-on-one coaching sessions assist with injury prevention and more. These sessions are customized for you individually and focus on helping you achieve your personal goals, overcome any perceived obstacles and gain new confidence.

Something for everyone

Whatever your reason for beginning or continuing a training program, you’ll find what you’re looking for at CLIENTEL3. Our clients have discovered that we can design a program for every person and their bodies. Our professional coaches focus on the details that will help you succeed. In addition to general training, we offer a wide variety of ways for you to improve or maintain your fitness; including:

  • Agility Training
  • Bodywork 
  • Boxing Sandbag and Battle Ropes 
  • Flexibility Training                
  • Obstacle Course and Race Training 
  • Shaolin Kung Fu and Brazilian Jiu-Jitsu
  • Weight Training

Sign up for a complimentary consultation to learn about the CLIENTEL3 experience and how it could change your life.