Fitness & Gyms near Monmouth Junction, NJ

“I’ve been a member here for the past six months and the change in me is visible — and the journey is great!
I train with Justin and Annie in a semi-personal setup, and they’ve been fantastic. They pay attention to form, push you at the right pace, and actually remember what you worked on last week. The fact that my membership also includes the CrossFit classes makes it even better — I get structured coaching plus the energy of the group sessions.
Honestly, it’s great value for money. If you’re on the fence, join. Easily the best investment I’ve made in myself.”

“Absolutely loved my experience here over the summer. I am a college athlete and this welcoming community was the best way to keep me motivated and in shape during the summer. I will be coming back on all my breaks and next summer! The coaches were absolutely amazing and so motivating. I recommend this to everyone- an amazing experience”

“Burn Boot Camp has amazing motivating personal trainers. Each week they cycle through different classes, offer multiple camps per day and it's self paced in group setting. Membership includes child care services which is extremely helpful; making it very parent friendly. The owners/ staff are very pleasant, knowledgable and personaliable. I highly recommend.”

“I've had a great experience at Orangetheory Fitness West Windsor. The coaches and staff create an encouraging, motivating environment that makes it easier to stay consistent with workouts.

A special shout-out to Michael—his energy is incredible, and he brings enthusiasm to every class. He keeps members motivated, explains workouts clearly, and makes even the toughest sessions enjoyable.

I also want to recognize Greg at the front desk. He genuinely cares about the members, always greets everyone with a smile, and goes out of his way to help. It's clear that he takes pride in creating a welcoming atmosphere.

If you're looking for a gym with great coaching, supportive staff, and a positive community, Orangetheory West Windsor is a fantastic choice!”

“I have so much love for this gym and the whole staff! The classes are great, the fitness equipment is awesome and the support and motivation is unmatched in comparison to any gym I have ever been to. Larissa in at the front desk is incredible - she care about the members joining, their input, and making sure the membership you get is the best one to help you meet your personal fitness goals! The Muay Thai classes are incredible and I can't wait to get back to it once I heal from my back injury. B52 Muay Thai - Love you, fam!”

“My 6 year old had a great party, and I was so grateful not to have to do anything having just welcomed a second baby. Thank you to the staff at tumbles! She had a wonderful day.”

“As a women’s health and wellness club at Rutgers, New Brunswick, we’re always looking for workouts that truly challenge us, and CKO absolutely delivers!

From the moment we walk in, the energy is unmatched. Coach Kevin was motivating, knowledgeable, and genuinely invested in helping everyone feel strong and confident. Every workout is different, which keeps things exciting and pushes us out of our comfort zones in the best way possible.

Our members LOVE the burn 🔥It’s the perfect balance of challenging and fun, and the supportive atmosphere makes it easy for everyone—no matter their fitness level—to feel welcome.

CKO has quickly become one of our favorite ways to train together, bond as a club, and prioritize both physical and mental wellness. Highly recommend to any student organization or group looking to level up their fitness game!”

“Amazing Place great people
Coach Troy it’s the man very caring and he’s knowledge it’s incredible super exited for the future with then.
Highly recommended ????”

“I have both of my kids enrolled at Swimming Splash Academy, and I want to give a big shout‑out to Miss Karen and Miss Kayla. I have seen significant improvement in my kids’ swimming skills, including their confidence with different strokes.
Miss Karen consistently goes the extra mile to ensure each child understands and follows instructions. If a child is having difficulty understanding, she patiently demonstrates the technique and makes sure the child is able to follow along correctly. Her dedication truly makes a difference.
The facility itself is excellent—the pool is always clean, there are multiple lifeguards on duty, and the shower rooms are well‑maintained and spotless.
I would definitely recommend Splash Academy to other parents who are looking for quality swimming instruction in a safe, clean, and supportive environment.”

“My husband and I have been going here for over a year now and it’s been an amazing experience! We have progressed significantly since we started. We feel stronger and much more active! The staff have been great and very supportive. Thank you!”

“I’ve been training here for almost 2 years now, and it’s truly been one of the best decisions I’ve ever made. I had never done CrossFit or lifted weights before joining, so I was definitely a bit nervous at first — but the community here is incredibly welcoming and inclusive, and all the coaches are truly amazing. A special shoutout to Coach Joe, who was so attentive and supportive when everything was new and unfamiliar to me — his guidance really helped me build confidence and improve safely.

The programming is excellent — always challenging but adaptable, and it keeps things interesting. They also offer a running class, which completely transformed my relationship with running. Huge cheer for Coach Nora for helping me fix my form and actually start enjoying running (something I never thought I'd say!)”

“I absolutely love this gym. Nick at the front desk is so friendly very helpful and always looking out for the members. The trainers here are amazing as well. Alvin really listens to what the client needs and goes above and beyond to make sure results are met. Never looking to change my gym.”

“I vehemently disagree with the sentiment shared below. Everything mentioned is subjective, and thus, should not be taken literally. I have been a member of this gym for ~4 years and have had the opposite feeling. The owners are courteous, caring, and passionate. For example, one time, I needed a specific cable attachment. The next time I came in, it was ordered. I never asked for it, but me mentioning it in passing was taken seriously enough for them to order this item.

Moreover, the badge not working is not a gym system issue. The member likely had a faulty badge. It is his responsibility to approach the owners to ask for a new one. I have entered the gym as late as 2 am and have had no issues. When I forgot my badge, the phone was answered immediately and I was giving step by step instructions to enter.

Finally, this gym is promoted as a warehouse style, hardcore gym. I along with my friends appreciate the hot weather because it allows us to get a better pump/workout, and allows us to build more resilience. The one fan is enormous covering almost 3/4th of the ceilings surface area and provides more than enough ventilation.

Diesel is the best gym i have been to, and has an excellent community - which is due to the passion, hard-work, and love the owners put into it.”

“I’ve worked out my entire life and have been a member of many gyms, but Orangetheory Fitness Princeton stands out.

The workout is comprehensive and a no-brainer. You walk in, and everything is mapped out for you. The coaches are not only motivational and personable, but also incredibly knowledgeable, bringing great energy to every single class. Shout out to Derek, Romeo, Jared, Sam, and Coach Boo. They know how to push you while keeping things safe, effective, and engaging. The staff is just as wonderful, welcoming, helpful, supportive, and genuinely kind.

What I love most is how the workout covers all aspects of movement and different training modalities. It’s effective whether you’re a young athlete pushing performance or someone simply committed to staying strong and healthy later in life. It’s structured, efficient, and it works. I've seen a lot of good strength and cardiovascular changes since I first started back in 2018.

I just show up, give my best, and in one hour, it’s done. Whether you’re a beginner or advanced, it meets you where you are and pushes you forward.

I’m so grateful to be part of this community. Thank you, OT Princeton. You rock.”

“Very friendly and knowledgeable staff. They know their stuff ⭐️This is the place to go to when you want to feel better both physically and mentally.Beautiful and clean space.”

“Stellar local gym. The owner, Gary, is very sweet and really cares about people & his facility. It has all the equipment you'd need and it's never crowded so I've never had to wait in a line for something I've wanted to use. The equipment and decor all share a unified retro aesthetic. Everything is kept extremely clean - I see the owner cleaning basically every night. This all leads to the atmosphere of this gym being very calming, perfect if you favor a quiet relaxing workout experience. Lots of mirrors and high windows letting in natural light. I just can't imagine using a crowded noisy commercial gym after frequenting this place.All the patrons are very friendly. Besides weights, there are cardio machines, a martial arts dojo with classes offered, personal trainers, spin bikes, and more. I've been coming here over a year now and it's become my new happy place.”

“Love this gym. I feel like I could lift a 1000 lbs in this place based off vibes alone. Thankfully the other boys in the gym were able to pick the weight up off my chest when my ego lift went south. Great spot.”

“This was an immensely positive experience. Workout classes are always tough, and Locomotion's HIIT circuit was. But the people in the gym were (1) locked in during the workouts, (2) inviting and encouraging during the breaks, and (3) and people stayed around for a little bit to chat after the workout ended. Whether they knew each other before or after, the experience felt non-judgmental, supportive and motivating. This was the epitome of a tremendous fitness group and community. I will definitely come back the next time I'm in Princeton, and I highly recommend others to give it a try as well.”

“Love the convenient location. I like everything about Retro Fitness. The place is kept clean; the equipment is always in good working order. The employees are very helpful and friendly. I will recommend it to all my friends.”

“I’ve been really impressed with this gym. The staff is always friendly and welcoming, and the facility is consistently clean every time I’m there. The new equipment is a great addition, and I’m really looking forward to the upcoming expansion.

Another thing I appreciate is the overall vibe—most of the customers are friendly, and there’s no attitude or ego. Lots of head nods, and smiles, which makes the environment feel comfortable and positive. Overall, a great place to work out and stay motivated.”

“I have had a very pleasant and encouraging experience at this Somerset center of Fitness Factory starting with Mason , the young receptionist’s welcoming smile to The amazing talented physical trainer Luis Rodriguez .
Luis has had vast expensive training himself as a body builder as well as motivating others to be in their best form possible.
He is always punctual, adjusting to clients schedules, and an expert at in use of different machines, to strengthen the muscles, without aggravating the joints.”

“Training with Mike is an absolute game-changer. He doesn’t just coach weightlifters—he develops independent, confident athletes who understand their craft. Mike genuinely cares about each of us as individuals, not just as competitors. He sees our potential before we do, pushes us to believe in ourselves, and gives us the tools to thrive both on and off the platform. He doesn’t just teach technique; he elevates you. He advocates for you. As a full time coach myself, he even promotes you as your own weightlifting professional, empowering you to take ownership of your journey. Under Mike’s guidance, you don’t just get stronger—you become a better athlete, a better thinker, and a better version of yourself.

Truly the best there is in the country.”

“I love the non fluff gym. Though basic, it meets the needs of a serious workout. Though small, it has all the necessary equipment, which never gets too crowded. I have never waited for equipment. Friendly staff and clean environment and affordable.”

“A candid assessment from someone who was there nearly every day for 15+ years. If you believe you'll benefit from working out with a personal trainer, this is the place to be. Based on observation and conversation, the trainers are knowledgeable, dedicated, and diligent. It's also a good gym for anyone needing a pool, child care, classes, or other extras. The fitness center is well-managed, clean, overall a very good place.

However, if you are a veteran gym-goer and just want a place to throw around some weights and work out on machines, I would definitely recommend that you look elsewhere. There's generally one of each machine and quite frequently someone is sitting on it scrolling on their phone between sets. Of course, you can ask to work in and share the machine, which most people will do, albeit sometimes grudgingly. A few cranky souls actually refuse, apparently believing that machine belongs to them. Also, a trainer and client will be often be on a machine for 5 minutes or more, chatting between sets. I tried to avoid asking them to share because that is the trainer's source of income.

I am admittedly a bit of an obsessive nut when it comes to following what I deem good gym etiquette and would never sit on a machine for five seconds. So I wound up getting annoyed (and annoying others) a few times each workout. I finally moved to a gym that is larger (and cheaper) and has a few varieties of each machine. People still sit there and scroll - it is 2026, after all - but it's always easy to find another of the same machine. I miss the trainers and some of the fellow gym-goers at PFW, but the annoyance factor has been almost totally eliminated.

That's one person's view, for what it's worth.”

“Gym is not clean and the sanitizer is water. Every time I leave feeling dirty no matter how much I use on the equipment. Also the GM is miserable, mean to customers and will probably call me to yell at me about this review. The only reason I keep my membership is because of Adnan the yoga instructor who is amazing.”

“I love this place... great classes with amazing teachers... daily meditations... the atmosphere and the people who gather are good company, too... the special workshops and courses... Aerial Yoga... and almost everything is free just asking for donations to help keep it happening... lovely”

“Monica is well versed in the different schools of Yoga and is able to very effectively leverage the various schools of yoga to my needs. She emphasizes the need to breathe correctly as she gradually graduates you to more advanced poses. Would strongly recommend a personal class for the maximum benefit”

“I have been going here for at least 2 years. It is a great gym. They are always trying to make it a better place. Installing new machines (and deadlift mats). Plenty of racks for free weights. The sauna, while small, is efficient. Only time I was annoyed was with their cancel policy on my yearly membership id kept going until i had to go to college. I Didn't like that they needed a 1 month notice and I ended up paying for a month I wasn't here but I should've expected that with a longterm membership. Overall a great gym for all levels.”

“This boathouse was donated by the Rutgers Class of 1914 who included some illustrious alumni including an investment banker, professor, senator and couple of congressmen. They were all great patriots and lovers of the Raritan River. Due to pollution upstream fishing and swimming were prohibited however boating and rowing was permitted. The boathouse has been restored and is in use now. It used to be in bad shape many years ago when New Brunswick used to be very run down.”