Fitness & Gyms in North Brunswick, NJ

“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!”

“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 ????”

“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 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.”

“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.”

“Eric was very kind and energetic as soon as I walked through the door. I inquired about membership information and Peter gave me a tour of the establishment and was very knowledgeable about the gym and kind . Would definitely come back here”

“Staff is solid, place is pretty clean. Just my only problem is the Bench presses, they are all pointing to the cardio machines. So you have to move the bench to not face them, but your force to reach them weird. So please turn them around”

“Absolutely love this gym! The staff is super friendly and always willing to help, and the variety of equipment is fantastic. I've met so many great people here; it's become my second home!”