ACE certified personal trainer

Jackie Nguyen lightening bolt

24 Reviews

About Jackie

Jackie Nguyen is a US Veteran, serving 8 years in the US Military. He is a 5th Degree Black Belt in Karate, a Certified Personal Trainer, holding First Aid/CPR/AED certifications, and is fully insured. Jackie attended Fullerton College and California State University of Fullerton and majored in Kinesiology (exercise science) and Nutrition.

He has over 20 plus years of martial arts training in the following disciplines and arts: Dutch Kickboxing, Muay Thai, Judo, Boxing and Ju-jitsu; and has obtained a 5th degree black belt in Hawaii Kempo karate. Over the course of his experience, Jackie has also been a Martial arts and Self Instructor and Kickboxing Coach.

For the past 15 years, he has helped thousands of clients, just like you, achieve their weight loss and fitness goals. The combination of his experience, knowledge, and educational background helps him create a specialized fitness and weight loss program that will assist you to drop 2 to 4 pounds of fat a week. With Jackie’s food plan guidance you will still be able to eat delicious and nutritious foods without going hungry.


I offered the following program:




I offered both One on One personal training and Small group training (up to 6 people) at a time. But usually the group has 4 people at a time training.


All personal training program includes a Meal plan, Nutritional counseling and Grocery list that tells you exactly what to buy and what to eat each day.  And a fitness and bodyfat assessment.




Dutch Kickboxing training is a FUN and FAST Paced (a explosive Kickboxing Style) that will guaranteed to helps you lose weight, bodyfat, get in shape, tone up and increase self-confidence.  (NO Sparring)




The world can be a dangerous place, and it's important to be prepared. So learn how to protect yourself and your family by using anything around you as a weapons.


Learn safety tips on how avoid being a victim of violence while at home, work place or college dorm . How to escape Hair grab, hand grab, shirt grab, get out of Strangulation, bear hugs, escape zip ties and duck tapes around your wrists and much much more.


*****Since my Self-defense and RAPE Prevention Class is more hands on hands training, contact me for availability*****


Most of my One-on-One training session availability is before 5 pm.  After 5 pm it's usually my Small Group Training Session.  And I'm available to train you from Monday through Saturday.


***** I am new to Fyt so please contact me first and let me know what program you're like to book an appointment for.  And if it's for One-on-One or Small Group Training before booking a session :) *****


Thank you and have an Amazing day!







My favorite client story

What's a push-up, lol. The gentleman was a very intelligent person who was a chemical engineer never exercise in his entire life until his doctor him that he need to lose weight and get in shape.

Pass forward 6 month he was doing 100 push-up and lost 35 lbs. and was in much better shape then he was in his 20s.

My favorite exercise

My favorite exercises are the bench press and lat pull down.

My favorite quote

Yesterday is history. Tomorrow is a mystery. Today is a gift. That’s why we call it ‘The Present’ – Eleanor Roosevelt

My training philosophy

I am a very supportive and encouraging coach that combined strength training, core exercises and circuit training with my meal plan, nutritional counseling and grocery list to helps you achieve the results you want.

My training experience

I've been training for the past 12 years and have 15 years of experience in Health and Fitness. My educational background studied focus areas are Kinesiology, Nutrition, Physical Education and Weight Loss. Resistance training, Core development, Specific sports training, and Strength training as well.

Areas of Expertise

  • Nutrition
  • Strength Training
  • Weight Loss
  • Boxing
  • Muscular Definition
  • Muscle Gain
  • Kickboxing

NCCA Accredited Certifications

ace certification ACE Certified Personal Trainer

Additional Certifications

CPR/AED/First Aid, Kickboxing Instructor, Martial Arts Instructor, Rape Aggression Defense (Women's Self Defense), Self Defense Instructor


Associates Degree in Physical

Who I Especially Like Working With

Actors, Beginners, Bodybuilders, Brides-to-be, Cancer Survivors, Dancers, Law Enforcement, LGBTQIA, Men, Middle-aged, Military, Models, Overweight/ Obese, Peri/Post-menopausal, Post-rehab, Pre/post-natal, Rehab, Runners, Seniors, Student-athletes, Women, Youth

Medical Conditions Experience

ACL tear, ADHD, Ankle Injury, Artificial Knees, Asthma, Bad Posture, High Blood Pressure, High Cholesterol, Lower Body Pain/Issues, Obesity, Postural Issues, Prediabetes, Pregnancy, Rotator Cuff Issues, Shoulder Issues

Additional Languages Spoken


17811 Sky Park Circle

Irvine, CA 92614

No Gym Membership Needed!

Jackie is a great trainer to train under. He likes to communicate, wants to understand your goals and work towards that. Training sessions with him have always been equal parts fun and challenging. Fun because he is engaged with you, watching your form and having conversation to go through the exercises. Challenging because he knows when you are plateauing and changes the exercise up a little. Even after the workout, he texts you to suggest what to do on off-days, what to eat and in general is a great accountability partner. If you are living in the Irvine area (or OC for that matter), you should definitely consider him.

Sashidhar g.

Being a beginner with workout I didn't know much, but Jackie was patient enough to teach and train me. He is always full of energy and that energy pushes you for training. I have been training with him for 6 months so far and I can say Jackie is the best trainer for a beginner.

Kiran Tej Thoomu

I found Jackie and he's a wonderful trainer! He's super affordable and he includes a free meal plan, grocery list, and nutritional counseling in his services. The gym itself is very clean and well ventilated. Jackie handles the pandemic very well by taking the necessary protocols of frequently disinfecting all the equipment and making sure that there is social distancing. The number of people are also limited per session and he focuses on making sure you're doing the exercises correctly. I've had a few sessions with him, and following his recommendations for diet and exercise even outside his facility have made me feel more energetic and just over all healthy. If you're unsure of signing up, I'd 100% recommend giving it a try.

Brooke S.

Jackie is an amazing coach and so much fun to workout with. He has immense knowledge on the workouts, and which ones give the max. growth. His sessions are stress busters for me... Workout and chats are best combination. I recommend trying his sessions at least once - the results speak for themselves in a short term.

Tejas N.

Jackie is an awesome personal trainer. He is personable and really helps you push yourself to achieve your goals. I will continue training with him for a long time to come.

Sid S.

Jackie is a great trainer! He pushed you when you need to be pushed but he doesn’t take it to the extreme. He trains you at your own level and at your pace, making sure that you achieve your fitness goals!

Adrian S.

I’ll start this by saying I do not enjoy hard workouts. I came home from work one day and my husband told me he signed us up for a training session, and I was less than thrilled. But, I went for the session with Jackie, and was instantly hooked! Jackie listened to my fitness goals and pushed me to the point where I was sore and saw results, but not to the point that I didn’t want to come back. He tailors all workouts to your needs. My husband wanted a tougher workout and more of a push, and that’s what he got from our sessions. Not only did we get a great workout in, but Jackie is very personable and makes the workout fun. He is flexible with time, there were so many days that we needed to change the time or day last minute, and Jackie worked with our schedule changes. He also doesn’t push you out when your hour is up. Jackie truly cares about your results and making sure you’re satisfied with your workout. Unfortunately, we moved out of the area- otherwise we would still be working out here! Highly recommend!

Lindsey S.

Jackie is an amazing trainer who will work with you on your personalized needs of fitness and get you the results.

Navneet K.

Jackie is a great personal trainer that helped me develop a fitness regimen to ensure my continued success! Jackie also provides a meal plan, grocery list and nutritional counseling so I don't have to worry about my eating habits cancelling out my hard work!

Sunny K.

I have been working with Jackie for almost 9 months now. I have worked with multiple personal trainers in my lifetime, and none bring the energy, experience, and knowhow that Jackie does to his craft. His workouts are exhausting, and he sends motivating messages throughout the week. We started before the holidays and I was able to hold my weight through the gluttonous holiday season, and then quickly started to change my shape in the new year. He is helping me build muscle and lean out, and I have received multiple compliments that I am looking healthier, thinner, and even my face looks thinner. He has been flexible with my busy schedule working at the hospital and has helped me achieve my goals. I am wearing clothes I have not fit into in years thanks to Jackie.

Ryan S.

Jackie is a very knowledgeable trainer, he knows the small technical aspects of each workout very well and is very motivating when you work with him. He also provides a free meal plan with specific groceries and quantities to buy. I Strongly recommend him.

Jordan L.

I lost 12 lbs my first month and 8 lbs my second month. Jackie acted as my personal trainer, dietician, and general life coach. I was going through a stressful time in my life with a bad break up, and difficult work life. Jackie helped me relieve stress through weight loss, exercise, and healthy living. I wouldn’t trade my experience for anything. My success is owed to Jackie. Ask him for my success photos. 20 lbs, 60 days. Anyone interested in a high quality trainer should choose Jackie!

John C.

Jackie is more than a good trainer: He listens to your personal goals and helps you to achieve them in ways that push you towards consistency in the gym AND helping you to take responsibility for your own progress. If you stick with him and listen, and push yourself over time, you will get to a point of self-motivation that leads to breaking thru the mind-blocks that prevented you from your goals in the past. He doesn’t track your progress with detailed charts, because he knows exactly where you are in your progress — and if you stay with him over time, you start to learn how you can do the same for yourself without the need for fancy apps and metrics: It’s all about setting your goals, understanding your own body, pushing it so you can surprise yourself and achieve better results, and trusting what he teaches you. In the end, no trainer can get you in shape. Only you can. But a trainer like Jackie who is disciplined, is very fit and continues to train himself, patient with you, but psychologically present and encouraging is in my view the best type of trainer for busy individuals who are seeking to transform themselves over time to be the best Them they can be. Throw away your Instagram comparisons and gym apps; stick with the fundamentals and a trainer like Jackie, and believe in yourSelf with Jackie on your side... It should also go without saying, but the key to a knowledgeable trainer like Jackie working well alongside you is her/his integrity, as well. Another facet where he blows away his peers, in my experience. Thanks for all your gym training, teaching and support, Jackie!

Saji D.

Jackie is an amazing trainer! He finds out what you need and help you exceed your goals. He has great energy and really knows how to motivate me to get the most out of my workouts.

Rick J.

Jackie is AWESOME! Would highly recommend him as a trainer. He knows what he is talking about, is down to earth, and gives you a great workout! He has a ton of experience and can really adapt to your goals.

David M.

I found Jackie online and I'm glad I decided to give him a try. He really cares about you and your fitness goal. I've been working with him for almost 3 months now and I can definitely see the change in my fitness level. I feel stronger, more energized and no longer run out of breath walking up the stairs.

Tara C.

Loved working with Jackie. He was very Professional, understanding and very accommodating. I was able to achieve the results I wanted. He provided meal plans and grocery list as well. Very affordable if your looking to get fast results don’t waste money anywhere else.

Sonia B.

Jackie is very friendly. He helps with workout machines and what kind of exercises you should do for certain goals, and ensure that it does not lead to any future injuries. I'd comeback for another fitness session when I do.

Solomon S.

I’m 62 years old and have been with Jackie for several months. He is so motivating, I find myself wanting to push harder for him. I’ve dropped over 15 pounds and when people ask how I’ve lost so much weight, I tell them I didn’t loose it - my trainer Jackie took from me.

David V.

Jackie is a great guy who really knows his stuff. He tailors the workouts specifically for your goals never worked out with a personal trainer before but so far I'm really happy with.

Eduard T.

Found Jacky online. He is extremely knowledgeable. Able to drop about 50 pounds in 6 months. I was in a bad shape physically, he customized the routines for me and gradually ramped up intensity. He is very flexible with timings and that helped me a lot. He is sincere, hardworking and makes the workout a fun exercise (pun intended)

Vamsi P.

The best trainer I have ever met. He not only teaches you skills but provides customized nutritions guidance and everything that benefits your body-shape. He is very patient and always encourage you to meet your goals.

Yali W.

Jackie helped me gain muscle mass and strength for my upcoming football season. He gave me a personalized meal plan and I show major improvements in a short amount of time.

Ricky A.

Great trainer. Love working with this guy. Very educated, friendly and social. Working out with this guy is a good time

Jesse M.

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