The North Shore’s #1 Gym for North Shore CrossFit Group Training, Personal Training & Middle & High School Athletic Training


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!

North Shore CrossFit 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.

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Personal Training

& Semi Private 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.

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MIddle & High School

Athletic Training

When you are not in season it is time to make athletic improvements. Use your time wisely. 

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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 just wanted to share with you the success I’ve had losing weight since joining the Treehouse 10 months ago. I was at an off-site meeting for work yesterday and saw some co-workers I hadn’t seen in about a year. They all commented on how good I looked and couldn’t believe how much weight I’d lost. Today I weighed in 32lbs lighter than when I started. In May of 2015 my doctor said I had high blood pressure and high cholesterol and recommend that an ideal weight for me would be 200lbs. I’m only 6lbs away from that goal and should reach in a month at this rate. I wanted to thank you for all your support. Having a great coach made my goals attainable. I can honestly say that I would be nowhere near where I’m at if I did this on my own. I look forward to surpassing my doctor’s goal and achieving my own personal goal. Thanks again!

Dave Watson

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.

Treehouse is an unbelievable place with amazing people. It does not matter what your athletic or physical background is, you can do it. Everyone suffers and succeeds together. As someone what has attended every different class time, I can honestly say it is the community that keeps me coming back. The coaches take the time to work with every individual, the members push each other, and you feel like you're a part of the family.

T.J. Baril

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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Book an online meeting with us, free! Talk to our caring and professional coaches over a virtual hangout and let's make your Treehouse experience the best possible!

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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.

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

Posted on by CoachDave

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

Posted on by CoachDave

Chronic Inflammation Tips

Get Inflammation Under Control Chronic inflammation has been shown to be the root cause to many serious medical conditions. This includes, cardiovascular disease, cancer, asthma, diabetes and autoimmune diseases. In addition to all of this, chronic inflammation makes you more vulnerable to viruses such as COVID-19, the flu, and the common cold. Guess what! You can have a dramatic influence in dialing that inflammation back and restoring some balance. Here are some tips… FOOD –… Read More

Posted on by CoachDave

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