Come use our facility at Clientel3

Clientel3 welcomes independent trainers!

Your Schedule, Your Clients, Your Expertise in our facilities!


CLIENTEL3 can be your new home! No matter your schedule or location, we want you to join us as part of our independent trainer program. C3’s facilities offer a unique boutique gym, with a fully built-out space and a large selection of fitness equipment. You can host your clients and reserve a session to maximize convenience for you and your clients!

Why us?

We know it’s difficult to look for a space to train your clients as an independent trainer! Commercial gyms are often crowded and lack the flexibility that you need to provide the level of personal training you want. At CLIENTEL3, we provide a space with flexible scheduling, predictable costs, and a state-of-the-art facility that caters to your needs as a trainer.


Join our community of trainers at CLIENTEL3!

How it works

  • Complete the online form.
  • Tour our space.
  • One of our team members will reach out and make sure that we can provide the right fit for you.
  • Receive a pricing list of the sessions’ costs.
  • Gain access to our booking platform.
  • Get the most flexible hours and scheduling in Boston!
  • Train and grow your personal training business with C3!

Let us help you grow your personal training business!

Proteus Motion Machine

CLIENTEL3 is currently home to the only Proteus Machine available for public use in Boston! The Proteus provides a brand new outlook on resistance training and fitness testing. With the goal of utilizing technology to unlock the next revolution in performance training.

Boutique Training Space

The training space provides a private boutique feel for you and your clients. Sessions can be booked by appointment, allowing you to create the training atmosphere that fits your training style!

A World-class Fitness Facility

C3 offers everything a trainer might need. From squat racks to free weights and cardiovascular machines to more unconventional equipment such as steel clubs and maces, Proteus Motion machine, martial art equipment, and various other training systems that you can utilize to improve your session.