Technically-focused, high-performance gym. I've been training here for almost a year now. Carlos, the gym owner, uses systematic approach to strength training and conditioning. I am a Jiujitsu competitor and he has been coaching me to develop more strength and endurance. My technique, endurance and, consequently, ability to lift heavier weights improved dramatically since I started. StayFit OC gym also regularly hosts Hyrox preparation bootcamps. My friend and I participated in the most recent one to prepare for Hyrox Anaheim 2024; it was both challenging and rewarding! If you've been training for a while and are looking for someone who can push you, provide the structure, and sustainably help you take your performance to the next level (without hurting yourself or overtraining!), I can't recommend this place enough. read more

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I couldn't be happier with my progress over the last year. Carlos has also continued to help me avoid re-injury (sports, accidents, surgeries and poor technique occurring before Stayfit OC). Im 41 years old, and have had many sports injuries, so I appreciate how well the program challenges you to increase strength, but also endurance. I have brought co-workers and my teenage son as well. They are all very impressed with his ability to help everyone as an individual, while keeping us focused and progressing. read more

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I've been going too Stayfit OC for close to 6 years now! Time flies!! I don't live close to the gym and don't work close to the gym either but here are the reasons why I love this gym and continue to choose this gym and make my commitment the past 6 years: Our coach/trainer Carlos is a great motivator and he is so good at what he does. He constantly challenges us and push us to test our physical and mental limits! Our workout programs are created by him and each program is hard but so good! It's a good pain kind of thing! You will never feel stagnant! There are many different levels so just ask! The gym is so clean and everyone is so nice. The perks of going to a private gym like this is equipments are in top condition and the cleanness is unbeatable. Plenty of parking at this gym and the location is in a nice and safe business area. Highly recommend this place to anyone who is serious about taking care of themselves well!! read more

Loved my first class with Carlos!!! I was nervous to arrive at 6am on a Monday (Mondays are Leg Days), but the workout was efficient, effective, and so much fun!! I almost forgot it was a Monday lolz. Each workout targets and activates a muscle group- Definitely felt the pump. Carlos was coaching me throughout the class AND he gently provided corrections and injury prevention pointers. As an endurance athlete, I really appreciated the flow of the Leg Day class. Each set is perfectly timed to prioritize quality of the movement mindfully, rather than speeding through mindlessly. Parking was super easy, which is always a plus. The space is also very clean with lots of breathing room! On top of that everyone in the class is supportive, kind, and ready to get swoll!!! If it's your first time- I highly recommend joining on a Monday at 6am!! This place is awesome and inclusive for anyone starting or leveling up their fitness journey. read more

So happy a friend of mine told me about this place. Carlos truly cares about your goal and progress. He would push you to work hard and the best version of yourself physically and mentally. I'm the strongest I've ever been. read more

Great workout place and great trainer. Cheep prices for the best workouts, I've seen a ton of progress already.

After trying a variety of different gyms, I can confidently say this is the best group training in OC. Committed coach puts together innovative, challenging, personalized programs designed to get you fast results no matter what your fitness level. My strength, endurance and conditioning have never been better. The gym is well-equipped, organized and clean. And there's a great, supportive community. I would highly recommend this for anyone looking to get fit and stay fit. read more

Lost 100 lbs in 9 months. Now i'm down 112 lbs and still going. My endurance and strength is the best it's ever been. The work outs are very creative, challenging, and can be fun. Not only has my trainer pushed me to success he's also become a great friend in the process. I would easily recommend him to anyone that is serious about their health. read more

StayFit OC - More than words...Results. - Trainers Near Me - Irvine, California

I've been going to StayFit for close to a year now and love the workouts. It has been hard for me in the past to consistently workout but StayFit makes it easy. The workouts are fun and challenging. The owner Carlos is an amazing motivator. I highly recommend you check out StayFit read more

Update (2020): I have been going here for 3 years now and I think it's safe to say I am a new person mentally and physically. Coach goes above and beyond for all his clients and besides my transformation and weight loss of 35lbs (to date) he is the reason I still attend. He holds me accountable and I needed that. It's easy to fall off track from your goals but not with this gym. I am happy I overcame my fear and intimidation of being trained by a professional as this is the best shape I have been in my entire life. Everyone is friendly and has turned into a family per se and I love it here! Can't recommend this place enough! read more

StayFit OC - Trainers Near Me - Irvine, California

So I was referred by my friend to check out StayFit. I saw her transformation and was so impressed by her results and how fit she had gotten within a couple months. I was so nervous but excited to go workout my first session with Carlos. He eased me into the workout knowing that it had been a longtime since I had hit the gym. Carlos made it super easy for me to feel comfortable with the workout. I definitely felt the burn and have to say I loved personalized workouts. This gym is amazing and I would recommend anyone that wants to see great results to sign up you won't regret it. read more

Carlos is awesome! I've been training with him for over a year and have watched my body and energy levels transform in ways I never could have imagined. It's not hard to get to the gym at 7am when you've got Carlos motivating you every minute of your workout. He's definitely pushed me to a new level of hard work and discipline that has improved every other part of my life. Carlos works hard and loves what he does. I highly recommend him. read more

If your looking for a place to make a physical transformation then this is your place. Since my time training at Stay Fit OC. I've lost 100lbs. My trainer has pushed me to do things I never imagined possible. The gym is clean and equipped with great tools to reach your goals. You can see the love for fitness and health from the owner as he goes above just training to motivate the clients with fun and friendly competition and extra workouts. read more

StayFit OC - Trainers Near Me - Irvine, California

So so thankful I was referred to Carlos and StayFit OC! I was tired of my same gym routine and wanted more personalized attention in a private and non judgmental atmosphere. I didn't like the feeling of big gyms and how crowded they are. From day one, Carlos discussed my goals with me and has pushed me in all facets towards achieving them. I have stuck to my workout plan because at StayFit OC, he mixes up, keeps challenging you, and even lets you play your own music! All things I needed to keep interest! It hasn't been easy but if it was, I would not have seen the progress that I've made in the year and a half I've been there. He definitely kicks my butt and I needed that! The gym itself is super clean (he's a little bit of a clean freak) and there is a ton of equipment we get to use every day. You never have to worry about waiting to use a machine, waiting for free weights, or wonder if something has been wiped down or not! Definite plus for me! Carlos has been flexible with my schedule and has even recently partnered with a meal prep service as well as CryoSpot so you can get healthy (and stay healthy) in multiple facets of your life! I've never been more consistent with exercise and fitness in my life. I'm very thankful to have found StayFit OC and Carlos! Highly recommend!! read more

I have been working out pretty much my entire adult life. I've had trainers in the past but honestly no one compares to Carlos' training! I've seen some drastic changes in my body. He truly cares about his clients! When I first joined he took his time with me and corrected my form. I am so thankful I reached out to him! I feel great! I feel more confident! To top it off, his gym is clean and his clients are friendly and very helpful! I love StayFit OC! read more

I moved to Orange County last year and was referred to this gym by a friend. I have worked out my entire life and have tried different workouts and this gym by far is the most progressive. I have hit many goals here and continue to learn the fundamentals needed to exceed. The most important part about this gym is that the classes are intimate, which means more hands on attention. I would highly recommend anyone on any level to work out here!! read more

train hard, train hard, train hard and overcome your physical and mental road blocks. This is what I learned over the last year and a half with the trainer at MJK. My goal was to become stronger, faster and leaner all at the same time. As long as you make it to the classes at least 3 times per week and their Saturday boot camp and stick with a diet you will love the new you. Classes are not boring since we do different exercises every day and Saturday boot camps push you to the limits, but damn it feels so good. read more

Carlos is an out of the box trainer and always pushes you to the next level. You will not be disappointed. Always something new, effective exercises and always positive reinforcement. Started to train with him and within a few months i can already feel my strength building, muscles growing and endurance improving. Its great to train with a fitness instructor and people that motivate you. Definitely feel confidently that my body is changing and for a good reason,TOUCH WORKOUTS!!! read more

When I gained alot of weight.... I knew it was time to start getting in shape! MJK Fitness helps me stay healthy, happy, and helps me make smart choices in my eating habits!!! I've learned how To eat right and stay in shape!! with the support of my family and great trainer, I will reach my goal in no time! 20 pounds lost .. 40 more pounds to go(: Thanks so much for helping me overcome my bad eating habits... And always keeping a POSITIVE and FUN workout environment!!!!! If you want to stay happy, healthy, and fit then MJK Fitness is definetly the place to go!!!! read more

If you're looking for a trainer that has a passion for what he does Carlos is definitely that guy. He is genuinely interested in attaining the same goals you want for yourself. He's a motivator with a great attitude. Would absolutely recommend him for anyone interested in testing their mental and physical strength. read more

I'm addicted to this place! I've been a quasi-athlete all my life and have always yo-yo'd in weight even though I worked out 6-7 days a week the last 7 years. After getting insanely frustrated with my lack of progress, I decided it was time for a change. I started training with Carlos 6 months ago and I've seen my body transform. And I started seeing results in the first 2 months! Carlos is the ultimate motivator, but beyond that, he knows exactly how to push you to your limit without compromising your safety. The gym is super clean, and he's constantly adding new, top of the line equipment. The classes are unlike any others being that they are really small so you get very personal attention. And every single person at the gym is extremely fun to work out with. Its like a big family (just better looking). He's completely changed my life, and I'd recommend him to everyone. read more

My story is definitely one that has been fueled by the encouragement of my trainer; A wise teacher and a friend. His drive and dedication is truly an example to all that aspire wellness in all aspects of our lives. because of him I push my potential each and every day; successfully and proudly I've reached many of my goals, thank you! read more

I've been coming here for 3.5 years now, and it's been life changing. I was never into going to the gym until i was convinced by my brother. The workouts are awesome, they're never the same. The gym is spacious and very well equipped. Offers different time availability and the prices are worth it. So if you're serious about fitness, this is the place to go. read more

This gym is for people who want to take their fitness to another level. I have always been an athlete but i learned while working out with Carlos Mojica that I could push my body even further. He not only taught me to work out in ways I never would have thought but also taught me how to balance it out with a proper diet. I now fuel my muscles and they don't feel as exhausted... Plus I see more of a difference. I truly recommend my trainer (Carlos Mojica) to anyone who would like to see their body transform to a better, healthier you. read more

Carlos is an amazing trainer. He pushes me to the limit everyday, but in the end it is all worth it. In the beginning, it was extremely difficult and I did not think I could handle any of this. However, training with him has made me feel confident about myself and I feel great. My endurance has improved immensely and I thank Carlos for it. I recommend him to anyone who is looking to get in shape and work hard for it. At first, it will be tough, NO JOKE!!! However, it will get better. read more

StayFit OC has been my second home for almost a year now. I joined after my cousin referred me couple months before my wedding. I needed to cut some body fat and i wasn't really motivated to do the same routine at Equinox. After attending one class i loved the environment, energy and passion Carlos brings to each class. If you join you'll quickly see how StayFit OC isn't just a gym, but its a fitness family. I encourage anyone reading this to join us. Tell Carlos Amir sent ya! read more

If you're looking for a training facility that will truly transform your body (and mind), then look no further than StayFitOC. StayFitOC is the gym that is not only going to challenge you physically but mentally, too. Whether you're just beginning your weight loss journey, or a seasoned fitness enthusiast, this facility welcomes all physical fitness levels. The place is clean and organized. The equipment is not run into the ground, you can just tell the machines are well taken care of. Most, if not, all classes are based on two categories-strength and conditioning. Do NOT, I repeat, DO NOT be intimidated by the photos or videos. It may look hard (or grueling) BUT how do you expect grow if you're not challenged? Coaches here communicate and work with you based on your fitness level. I started my fitness journey a few years ago and with their help, guidance, and fun workouts-I was able to lose a significant amount of weight. What I enjoy the most about this facility is the functional training. Tire flips, sledgehammer drills, sled drags/push/pulls, just good ol' grunt work. However, we do incorporate bodybuilding movements into the programs as well. I would highly recommend this gym to anyone who seriously wants to take their fitness to the next level. Throughout the years, coach is not only a trainer but friend, too. #StayFitMyFriends read more

I have had other trainers before and was content with the workouts they gave me until Carlos had told me to come in for a trial, ever since that first day I was hooked! The workout's I once thought were effective I now realize were basic things trainers have clients do to get them tired and believe they are doing something worth their time and money without really working out your muscles! Every time I go into the gym Carlos has new challenges awaiting me. There has been times I am given a workout and I question why I am doing it, but once I try out his workouts I feel like my body is on fire triggering muscles I never even knew I had! (So I have learned not to question him anymore) Whether your trying to tone up, build muscle, loose weight, or build your balance he has amazing workouts for it all. It amazes me to see all his clients each week with so much progress and keeps me motivated to keep working towards my goal. I think one of the most important things to look for in a trainer is someone that is not only going to get you in shape with great workouts, but be there for you mentally to push and believe in you at all times which Carlos always does for all of his clients. He is not one of those trainers that works on the clock, if you don't finish your workout but your time is up he will sit there with you until you finish, which is something MANY trainers do not do! I highly recommend Carlos as a trainer and mentor, I hope that he can help all of you get in the best shape of your life and build your self confidence like he has helped me! read more

i've been training here for two years now and i love it. i never trained before coming here, i'd swear i was allergic to exercise. and now this gym kind of feels like home. the workouts are constantly changing, and they're quickly modified to fit into whatever goals you're trying to accomplish. not only is the trainer constantly pushing and motivating, but the other clients are also encouraging and friendly. the gym is very spacious and clean, and there's equipment to accommodate any sort of fitness. i've built endurance and strength here that i know i couldn't have done anywhere else. read more