The North Shore’s #1 Gym for Group Training, Personal Training & Brazilian Jiu Jitsu



The gym is your platform to do great things in life.

Since 2005, we have helped more than 10,000 people begin their fitness journey by providing a forum for learning the foundations of fitness in order to live a healthier and more active lifestyle. Our coaches will develop customized programming in order to help you learn, adapt, and to reach your goals. Whether you’re looking for muscle building, weight loss, athletics, lifestyle coaching, and any other event based training. We offer a solution just for you—and we’ll be cheering you on every step of the way!

Group Training

Workout in a group setting with one of our coaches. From Power & Strength to Skills & Conditioning, the group has you covered.
Classes can work for anyone, regardless of
where you’re at on your fitness journey.

Personal Training

Personalized coaching is the best option to reach any goal; from losing weight, building muscle, refining a skill, or sport specific training. Our Personal Training programs are aimed at your own unique needs with a dedicated coach, just for you.

Brazilian Top Team

BTT North Shore specializes in 
Brazilian Jui Jitsu, mantis boxing, kick boxing, wrestling and other MMA fighting styles.
The BTT academies are inclusive
of both adult and kids training.


Ready to get started?

Schedule an intro session to learn how we can help you meet your goals!


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from our members

Testimonials

I started at NSCF/Treehouse Athletics in April 2015 and after I experienced my first (fun, albeit difficult) workout, I knew this was for me. These Coaches genuinely care about each person that walks into the gym-and they all live up to their motto– Coaches for life! I get stronger every day and I am proud of myself for what I have accomplished.

What I realized is there is no need to be intimidated. You are there for YOU and to better yourself! All workouts can be scaled or modified to fit your abilities. All members encourage and cheer each other on—we are all there to improve our health and quality of life. You really won’t find a better group of people; this is a true community and no other gym compares!

Janice G.

I’ve been active most of my life and decided this was my next step. So glad I tried it! I started and continue my training with Max. He rocks! All the coaches are very positive and and helpful and so are the members. Everyone encourages each other all the time. I have a long way to go but am enjoying the journey.

Maggie Getchell

Been going here for more than 4 years and love everything about it more every day.

Christopher Pierce

I love Treehouse School of Fitness! This gym is magical. My endurance has increased and I’m building muscle tone. The coaches are all top notch. They make the classes fun and enjoyable. I never thought I’d be singing Benny and the Jets at 6am. Fitness is fun at Treehouse School of Fitness!

Laura Gallagher

Why Treehouse featured image

Why Treehouse

Proper assessment and an individualized game plan from our personal trainers will help you stay focused on your own unique goals. Treehouse will help you become the best version of yourself possible with programs designed 100% around you.

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Latest Posts From Our Blog

Education and coaching that goes beyond workouts. Read our articles about overall wellness, nutrition, recovery, building healthy habits, and how to develop an active lifestyle in our blog.

Check in: Stress Edition!

The longer I have been a coach (in my 3rd decade now); the fact that you can’t outwork a shitty diet has proven time and time again to be true. But, you also can’t perform high intensity workouts yet still expect outstanding results if you are chronically stressed out.  In my younger years, I frequently advised my clients and myself that when a stressor arose (due to family, running a business, relationships, etc.) going to… Read More

Neil’s Meals: Simple Veggie Prep

A simple veggie roast that you can add to your daily meals as you go. If you’re prepping proteins as well you can throw these two together at anytime and you’ve got a meal! Items needed: 1 Sheet pan/Cookie Sheet etc Veggies of choice (Here we have cherry tomatoes, zucchini red onions and bell peppers!) 1-3 TBS of Oil of choice (suggested olive or avocado) Seasonings: oregano, garlic powder and some salt and pepper Directions: Preheat… Read More

Will Lifting Weights Make Me Bulky?

This is a question that we come across often when discussing exercise prescription for a client. Usually the question is posed by a woman, but not always. When asked this question, usually the picture one has in her head is such as to the left. (photo courtesy of femalemuscleguide.com) My immediate response is that it depends. This response either provokes curiosity or frustration from the client. I can understand those emotions because so much information… Read More