Invest In Your Health

Absolutely fantastic trainer. Functional fitness knowledge on how to properly train, avoid injury, and being healthy ….no one does it better than KEY.

If you’re an athlete feeling stagnant (or just starting out), Key Fitness is exactly the kind of place that will push you forward. Ky brings a level of creativity to his programming that keeps every session challenging and never repetitive. The workouts are well thought out, engaging, and consistently push you out of your comfort zone. What stands out most is his energy as a coach—he genuinely motivates you to give your best every time. It’s rare to find someone who can hype you up the way he does while still holding you accountable. Ky also leads by example. He’s in phenomenal shape, especially for someone in his 50s, and clearly practices everything he teaches. That credibility shows in the way he trains others. We need more coaches like Ky who actively promote and live out overall health and fitness.

I first met Ky Vuong while working out at the Atkinson YMCA in 1998, and I can say without hesitation that he is the most inspirational fitness trainer I’ve ever encountered. What sets Ky and Key Fitness apart isn't just his deep technical knowledge—it’s the fact that he leads by example every single day. ​He has a unique ability to push you past your limits to ensure you get real results, but he does it with a level of energy and positivity that makes you want to work harder. His care for each individual is second to none; you never feel like just another client. If you want a trainer who is as invested in your goals as you are, Ky is the person to see.

My entire family is training with Key and we are all very sore and very, very satisfied! Key is by far the best personal trainer I've ever had -- he keeps things interesting without resorting to rote routines, which really helps challenge me and improve my overall fitness. I found his functional training to be especially helpful and satisfying. He brings a level of energy that you don't usually find with other trainers, keeping me motivated and wanting to continually learn and improve. Highly recommended (but be warned, he doesn't mess around!). Thanks Key!

I am cautious about my reviews and rarely post. I post if my experience is really, really awful or exceptionally well. This post is about Ky Fitness and the owner Ky Vuong who has now become a very dear friend and best personal trainer I've ever been with. It's written because Ky's service is exceptional. A few years back I was following the neighborhood app when I came across an interesting one of people working out with a personal trainer in Kaneohe. That year, at age 72 I wanted to become more intentional about my balance, strength, mobility and future aging. Can't stop the aging, but can make an effort to keep the quality of my health and wellness the best it can be for the time I have. The videos were brief and entertaining, more so the intent of Ky's functional fitness classes for all ages was just the perfect idea in theory; close to home and directed specifically to my goals for longer and healthier longevity, with independence. Thereby, I finally called Ky Fitness for an appointment and to give it a try. So, we meet. Ky asks a few questions and immediately gives me an assessment by having me pull, push, lift, jump. Ah yaaa! No paper nor pencil reference, just real time moving. I'm thinking, "I wonder if I like this?" The session ends, his price was very reasonable for a professionally trained, educated personal trainer with and over 30 years of experience and....he trains every single day on himself doing amazing physical workouts that exhausts me each time I watch! Pretty rough stuff and a must watch, if you think I'm exaggerating. This guy, walks the talk and is genuine in his efforts to assure slow and steady positive outcomes. A few one to one sessions boosted my confidence and yes, it takes planning and effort to get to his home where he has his big gym in his garage, yet, I kept returning. Then, my bestie since we were kids who has always been physically and mentally active gave it her first try! Hooked....since then it's been a duo session, once a week, very early in the morning for a few years! Currently, we have another partner, making it a trio of Kupuna who have the same goal in mind; to be able to live and mature well; with confidence and gratitude for good health. Ky helps us do this! It's always a great workout! We laugh, we grumble and we enjoy each other tremendously! Yes, it's hard sometimes but Ky is flexible and when I whine for a bit, he may take off 5 pounds of weight or lessen the repetitions. He doesn't do this often as his and our goal is to get stronger and keep muscle building, thereby new challenges are vital, (haha) according to Ky. It's a fun one full hour each week, now a part of my week and a rewarding habit and routine to look forward to! Unlike other "personal trainers" that are given certifications to be a P/T Ky is fully qualified and focused on us. There is none of this "okay, do 25 reps" and I'll be back! He is right there, present and attentive and so very creative! Try Ky out. He just brought in this huge, beautiful fitness truck. Great for sports teams and corporate team and body building. He comes to your place. How convenient and such a fresh way to beat the stress of having to drive some where for training! One phone call and he's right there. Too long of a review. But, it's a fun experience for me and my silver haired buddies. We're getting stronger each time, our confidence is sky high, our alertness to how we move day to day doing functional tasks is in the forefront, we're just lucky to be working out together under the guidance of Ky; having fun and finding joy and hope for our present and future wellness! Thanks Ky, we love you!

Ky (pronounced key) has been training my 79 year old mom twice a week and we have seen marked improvement in her balance, strength, and form. He is highly attentive throughout the session ie does not get distracted with off-task phone use; is always punctual, responsive, and dependable. He focuses on thoughtful functional training - training that is diversified and strategic as opposed to just doing the same ole’ routine. Me and my brother (both of us are fairly active and work out 4-6x per week) also trained with Ky a couple of times and we were sore in a very good way afterwards. Ky brings a new rainbow of exercises every week. Each session is structured but “new” as he seems to have an encyclopedic knowledge of the different strength, cardio, mobility, balancing exercises. He is also very patient and encouraging and his energy and enthusiasm are infectious. His energy is like our volcanos; his heart is pure aloha; and I would highly recommend especially for folks who are looking for an attentive and meaningful trainer for elderly parents.

Training with Ky has been a game-changer! His personalized approach, encouragement, and expertise make every workout effective and empowering. Key Fitness Hawaii is truly something special!!

Ky and Key Fitness Hawaii set the standard for functional training. Professional, motivating, and results-driven—this is fitness done right.

My family has had the opportunity to work with Ky regularly over the past few months utilizing his FitTruk and we can’t get enough! As a parent of two high performing student athletes, I have seen lots of training techniques and programs but nothing compares to the functional fitness training that Ky provides. It’s the perfect mix of intensity, strength, cardio and best of all… FUN! We have already begun seeing results, and plan on continuing our FitTruk training sessions. Ky is an incredible motivator and provides consistent feedback and encouragement. Not only does he provide personalized training for each kid, but he also provides important guidance in nutrition and hydration practices. If you’re looking for personal training, or team training to take you to the next level of competition, look no further- THIS IS IT.

Ky is the best! I really needed someone that would motivate me and someone I could feel comfortable with. I’ve had difficulties working out since I became a single mom - Ky lets me bring my kid, she plays, I get to work out. I don’t feel like I’ve taken away quality time with her. Ky really tailored my fitness for me and he’s so personable!

I turned 59 and decided to call Ky. As a 5'7", 250 pounder, I did not want to go to a gym because it is intimidating. There are a lot of very fit people and I have no clue how to use any of the machines and free weights. I started functional fitness training (exercises that train my muscles to work together and prepare them for daily tasks) with Ky on June 11, 2025 - two, one-hour sessions per week. After eight weeks I have lost eight pounds, and I am stronger, have more stamina, and slimmer in my midsection. I also see muscle definition in my arms, shoulders, back, and chest areas. I feel much better physically and mentally. Ky is a great personal trainer and his functional fitness sessions are fun. He is encouraging but not demanding. He pays attention to what you are doing and how you are doing the exercise so it is done correctly. He also "models" each exercise for you and explains what areas he is targeting/focusing on when doing the exercise which is extremely helpful. If you really want a good investment, invest in Ky. Like you, he wants the best for you.

Coach Ky is super amazing. He motivates his clients and creates a supportive, yet competitive community. His passion for fitness and his business is truly remarkable. Totally check out Key Fitness!!

I am just starting my fitness journey with Ky. I have total confidence in his program and look forward to resolving some of my joint issues. His positive encouragement pushes me to keep going.

Reached out to Ky to inquire about senior fitness for my Mom. He responded right away, and we started with an assessment. Ky is high energy and very encouraging, yet approachable for all levels. My mom was hesitant at first, since training is completely new to her, but grew more comfortable and confident as the session went on. We think she will do best training with other seniors, by joining a group Ky trains on Fridays. It's great to know there are many options to train one-on-one, with your family, or in a group. If you are curious, reach-out and try a session, it might just change your life.

Professional, enthusiastic, and family friendly!

It was excellent training with you! Thank you so much for the opportunity and opening my perspective with different kinds of workouts.

Thank you so much for a great workout. It definitely tested my endurance and strength. I would love to workout with you again if our team have the chance.

I've been training with Ky for over 2 years now & it’s one of the best decisions I've made for myself!! I feel so much better, more confident, clothes fit better & best of all I really enjoy it! I always look forward to his bootcamp sessions on Saturdays, so much fun when you workout with a group. I highly recommend Ky, He is very knowledgeable, motivating, and always create a fun and challenging workout environment. He motivates you in a session while pushing you to your max.

The training was amazing! Ky had us do a intense workout with different stations that covered everything from head to toe. He showed us the importance of balancing out your workout to be more healthy and able to do more in the long run. I highly suggest his training to anyone that is big into fitness and your health because he knows what’s right to make you better. Thank you very much for this opportunity!

Ky has an energy that is absolutely infectious! Looking forward to spending time working with him and his program!

I’m from Maui, but I was lucky enough to experience this once in a lifetime opportunity when I went over to train for an upcoming competition. Coach Ky has an incredibly unique style of training and fitness that I’d previously never come across, and I can only wish to go back to Oahu and train again. Words fail to express ho much I recommend Coach Ky.

Ky fitness is really the “Ky” to your fitness goals! Short story. I first met him the night I injured my shoulder at the gym that sent me to the ER. (Trying to do a handstand.) Fast forward. I pushed myself through injury to randomly again meet him. This was after I literally did the same exercise that injured me. (Crazy timing) His words of wisdom. “Rest.” Me being too stubborn. “I’m not going to rest. What or how should I train?” Ky. Well… let me help you. Me….“Ok” Well this has been the “KY” to bettering myself and my development! His boot camps and specific trainings have helped build and develop me physically and mentally with keeping my shoulder intact! No pain! I’m so grateful! The group boot camps are affordable and the team is amazing! So diverse. Its not intimidating at all! Really a family atmosphere! Highly recommend.

Amazing ! coach Ky dedicated some time to help train myself and 6 cadets. It was intense but he made it fun long the way. With music and timers and he shows you the proper way to work out. He engages and continually motivates. Outstanding job one the best classes I've been to in a long time. Everyone wants to go back. If you get a chance give him cal and schedule a workout you won't regret it.

Ky is an absolutely amazing personal trainer! I’ve been with him for about 5 months now and I have never had someone push me past my limits and motivate me in the ways he does. He is so encouraging and keeps the workouts full of variety. He’s a joy to be around and makes the workout very enjoyable despite this challenging the workout is. I highly recommend, he and his workouts are the highlight of my week!

Mahalo to coach Ky for giving the USAF Aux CAP cadets a great workout. Highly recommend anyone looking to get their functional fitness on, reach out to coach Ky and let him help you reach your goals.