Very experienced trainers who really know fitness. I successfully lose about 10 kgs and never gaining it back because of their support. Great community and service. Super friendly and highly recommend.

I am more than happy to share my outstanding experience at Flash Fitness. From the moment I walked through the doors in 2019, I knew I had found my fitness haven. With Jeff's expertise and the warm hospitality provided by both Jeff and Ritah, this gym has exceeded all my expectations. First and foremost, Jeff's extensive knowledge and passion for fitness truly shine through in every class. Whether it's strength training or cardio Jeff's guidance ensures that each workout is effective, engaging, and tailored to individual needs. His expertise is unparalleled, and his ability to educate and motivate is truly inspiring. What sets this gym apart is the remarkable sense of community fostered by Jeff and Ritah. They have created an environment where everyone feels welcome, regardless of their fitness level or experience. The gym's friendly atmosphere encourages camaraderie, and it's wonderful to witness the mutual support and encouragement among members. It truly feels like a fitness family! The class-based approach is fantastic, as it allows for variety and ensures that every workout is dynamic and engaging. Would highly recommend Flash Fitness to anybody in Bangkok!

Flash Fitness is a place where a bunch of people with common goals get together and become a family, you just happen to achieve amazing results in the process. Flash’s unique high intensity workout routines and the extremely knowledgeable trainers/coaches, Jeff & Ritah, allowed me to lose 7% body fat in just 3 months! They have fundamentally changed the way I think about fitness and nutrition and I couldn’t be happier! 💪⚡️💪

I’ve been going for a few years and totally recommend Flash! Great small classes, with lots of lovely people, suitable for all fitness types. They’ll also talk to you about nutrition if you want. Options for online and private training as well.

A great gym with lovely, encouraging coaches, Flash Fitness gives you real results and good vibes (everyone there is warm and welcoming, unpretentious, and you feel like part of the Flash team). Workout routines are great for all levels at a really good price (best thing about it is there is no expiry date on a course, so you can work out at your own pace, but of course you need to come often to see huge changes). The workout varies every day ranging from functional training to strength and conditioning, with an added mix of cardio so there's something different for the addicted gym rat coming mon-sat. Love the place, great location, highly recommend it.

Great and welcoming community for people across all fitness levels! Intense 30-minute workouts that will challenge you and super charge your fat loss journey. Awesome trainers who can work with your current abilities and help you progress over time. Book your trial workout and inform Jeff & Ritah a day before joining any sessions as classes could get full! Been working out here since 2012. Joining Flash has been one of the best decisions I have ever taken for my health. ⭐️⭐️⭐️⭐️⭐️

Im not a gym going person at all, BUT, I have joined Flash about half a year ago and I really love coming here. The trainers -Ritah and Jeff- are awesome and the community is really welcoming not intimidating at all. I would say all levels are welcome and you will see results even if that wasnt your main goal (mine was just to hang out with cool people while sweating and listening to some music...all this before bedtime 😂)...however if that is your objective you will definitely see progress of your health and fitness within a short time! Bring some (sugar-free) cake if you do decide to join! 💪🏻

Such a great place to build up a good, healthy exercise lifestyle. Jeff and Rita are really supportive and enthusiastic. It was so great to be there with them!!!!

Flash fitness with friendly environmental fitness ever, people there are nice and friendly. The program each day is challange Jeff and Rita are awesome always support. Big result Big change

I became a member at Flash Fitness almost 10 years ago shortly after my wife and I moved to Bangkok. My workouts quickly evolved from group workouts once a week at Flash to private training with Jeff 3 times per week. These were and still are THE BEST training sessions I have every had. The knowledge and motivation Jeff and Ritah bring to workouts is world class. If you are looking for intense workouts in a very encouraging and friendly environment you should checkout Flash. You will be exhausted, but you will NOT be disappointed.

Jeff and Ritah are very experienced trainers who can guide you through forms and workout. They make sure you have an effective and productive session. Great Flash community, everyone is friendly and welcoming. Highly recommend!

I signed up for 8 weeks and I can see amazing results! Flash Fitness is the best place to be for your fitness journey. Jeff and Rita, the powerful duo behind this gym, provide effective tools that can help you meet your wellness goal. They are so friendly, very supportive, funny, energetic and of course, motivating. This gym community is not intimidating, not overwhelming and you can participate in all the activities without harsh judgement. I signed up for another season and I am excited to establish healthy relationship with myself and the rest of the gang here. Come and join us! Let's enjoy this fitness journey together. #BestDays #SelfLove #FitnessJourney

My wife and I had a 1 month stay in Bangkok and decided to join Flash Fitness to try and counteract all of the street food eats. We were so happy we did! Jeff and Rita are absolutely the real deal. They and the other members immediately welcomed us to the pack. Their legendary training helped me shed 10 lbs while still indulging in all the delicious food, making friends and having fun! We absolutely loved it here, and can hopefully come back!

Great gym with a super supportive community. Jeff and Ritah are some of the best coaches I’ve worked with!

This is the perfect gym for me. As a working mother of two young children, the sessions are quick and effective allowing time for me to focus on myself without feeling the mummy guilts. I’ve not only lost a few kgs but I feel so much fitter and stronger since joining Flash. It really is an incredible place!

I got my Sixpack from Flash within about 2-3 months then I couldn't stop going there because it's not just about getting healthy but it's also about the good vibe Jaff and Rita provided. Beside training I also got to know how to eat better and sometimes if I need kinda fast track to get in shape Jeff and Rita also guide me to achieve the goal. I'm now leaving in the Netherlands and I miss going to Flash very much. Flash is one of the best experience I've ever had. Thank you very much. 😘

Jeff and Ritah are the best people in the world and their program 100% works. It works because you make lasting relationships which hold you accountable to your goals and make it easy to get motivated to come to the gym. If you are looking to get in shape FLASH is the place to go! Personal and individualized care right from the start.

I’ve been coming to flash for about 4 years. I’m the fittest I’ve ever been, and I can’t imagine going anywhere else now. Jeff and Ritah are extremely knowledgable and supportive, and it’s a really warm community atmosphere. The workouts are varied and challenging…and done in 30 minutes :)

Flash fitness is definitely my most favorite gym in Bangkok. This place treated us like one of their family! Jeff and P’Ritah are great trainers that not just tell us what to do but Jeff always have scientistic knowledge and data to support what he tell us and I think that’s what make difference from other places I have been to. It not just ok believe me and do what I tell you but Jeff and P’ Ritah always have research/ reason to support. Another thing I love about this gym is most of gym people here are also very nice and friendly! The vibes are like you going to meet your friends, sister or brother and there’s always a great laugh even it was an intense workout session! Highly recommended this gym as I also introduce a lot of my friends here too! #flashfitnessfamily

I love Flash! I can’t praise Flash, Jeff, and Ritah enough. Jeff’s energy and enthusiasm is contagious, and his knowledge of exercise and nutrition is extensive. When I was going to Flash classes I was in the best shape of my life. It doesn’t matter your age, if you go to Flash classes and follow some of his eating habit suggestions you will look and feel great!

Great workouts and great trainers, thanks to Jeff and P’Ritah. I have had a wonderful experience at Flash Fitness with a great vibe and great people. I enjoy every session here. The workouts here are always challenging and do not take a lot of time.

Small, personalized classes means you get to work out with friends (or make new friends!) under the supervision of trainers who really know what they are doing. Every week, there are three short, sharp workouts designed to get that body moving, the fat disappearing, and muscles growing. It works. I'm 53 and I these workouts have been keeping me fit and strong for the last 10 years. If you really want to get fit, lose weight or prepare for a challenging event of some sort, you absolutely need to come to this place.

My husband and I ve been coming to Ritah and Jeff private classes since 2019 when we are in Thailand. Flash fitness has the best promising result that we ve never experienced anywhere else. During class, we are encouraged to trust our body capacity. It has been great cheerful experience. Both of them are professional and resourceful. Group class with other peers were fun and great vibe, both local and expats. Recommend for those who wud like to see the overall fitness result.

As a gym novice, I used to be intimidated by most of gyms and classes. BUT Flash really blows that away for me! This place is fun, friendly and very professional. Jeff and Kru Ritah are professional and highly experienced in what they do. The workout they provide is challenging, yet satisfying within the span of 30 mins. Also gained insightful fitness & nutrition knowledge from here that can & still be used for life. 10/10 recommend!

The best gym in the world. Jeff and Ritah don’t just coach you so that you’ll lose some fat but they also creat this amazing community for gym maniacs so that we can share the experience together. This is not a place that you’ll come just to lose few kilos. They have shape you behavior to be healthy person inside and out so that you’ll stay healthy forever. Thank you for the good work guys, cheers!

Flash is more than a gym it is a family!!!! Great trainers!!!! These guys know what they are talking about and they are passionate about it! Flash is my sanctuary. The only place in BKK that keeps me sane and fit. Thank you for everything guys. Very grateful to know these amazing people. Highly recommend.. What more can I say :)

Flash fitness has a very personal touch, meeting your needs at whatever fitness level you are at, whether you are you are new to exercise or looking to challenge yourself more. Jeff and Ritah are always welcoming and encouraging. I’m so pleased I was introduced to flash fitness in 2019.

When I arrived in Bangkok in 2015, sleep deprivation, low energy and back pain were my common symptoms. A friend of mine recommended Flash. The first lessons were hard. By hard I mean I needed to hold on to the rail to go down the stairs but it’s worth the effort. The more you go, the better and fitter you feel. One of the things I love the most about Flash, beside Jeff, Ritah and the community, is that the workouts are short, between 20-30 minutes. You need just 2 sessions per week to stay fit! I left Bangkok recently and fortunately they have online trainings. I have tried a lot of gym classes, in the US and France, but believe me, nothing is as comparable. Give it a try, you will not regret it!

I've been working out with Jeff and Ritah for over a decade. I'm over 50, and I don't think I've ever been fitter than I am now. Jeff designs workouts that are fun but challenging, and makes sure everyone in the class benefits. I love coming to Flash, and would recommend it for anyone interested in staying healthy, getting fit, losing weight, or even just to have a great group of friends to hang out and enjoy some movement with.

Flash Fitness has been a life changer for me! Keeping me fit, providing an incredible community to help maintain and work hard at staying fit, and the best instructors that encourage and make sure that I am doing my best. The work outs are so well thought out and planned for total body fitness. My health and well being have never been better. Thank you!!!

Working out at Flash Fitness is very wonderful. Only 25 minutes per session with great trainers (Jeff and Ritah) got me an amazing result. The vibe and people are also great. Very glad to join Flash Fitness!!!