★ 5

Eric is an incredible coach who brings his personal experience and skills of the sport to the table. He meets each person where they are and will push you to be better every single class. Whether you are seasoned in boxing or looking as a beginner, you will gain something from these classes and have fun doing it!

Source: Google

★ 5

I've been going to Knockout Fitness for 5 months now and I recommend it to anyone who will stand still long enough to listen. Whether it's a larger high intensity class, or a smaller focused class, you will get a great workout, learn technique, and gain focus.

Eric is a fantastic trainer who pays attention to your movement and habits, and provides instruction and techniques specific to the individual that greatly increase energy, flexibility, and power.

Highlight of the week, absolutely sign up and check it out.

Source: Google

★ 5

I’ve been training with Eric Hernandez for years and I can confidently say he’s one of the best boxing coaches I’ve ever worked with. From the very first session, he made it clear that technique, discipline, and safety were just as important as power and endurance.

What really stands out is his attention to detail -every punch, stance, and movement is corrected until it’s second nature. He tailors workouts to your level, pushes you hard when you need it, and celebrates your progress along the way. Whether you’re training for fitness, confidence, or competition, you’ll leave every session feeling stronger, faster, and more capable.

Eric Hernandez also brings incredible energy to every class, creating a motivating, no-nonsense atmosphere where everyone feels supported but challenged. You can tell he genuinely cares about his clients’ growth both inside and outside the ring.

If you’re serious about getting results and learning real boxing fundamentals, I can’t recommend Eric Hernandez enough. Every round is worth it.

Source: Google

★ 5

Eric is an incredible boxing coach. He’s enthusiastic and structured, and has an amazing eye for detail — he notices the smallest adjustments that make the biggest differences. His focus on technique and form sets him apart, and his patience makes learning both enjoyable and effective. Couldn’t recommend him more highly.

Source: Google

★ 5

I’ve been taking boxing classes with Eric for a little over two years, and when my schedule allowed, I also worked with him as a personal trainer for several weeks.

Eric is an excellent boxing coach. He pays close attention to form and technique. He noticed that I was compensating for some chronic foot pain, and switched me to a southpaw stance, which made a huge difference. He makes targeted adjustments and knows how to push people past their self-doubt. Over time, you can really see your cardio, coordination, and confidence improve. Whether you’re a first-timer or more advanced, you’ll walk away having learned something new. Eric also creates an atmosphere of camaraderie and fun; people show up early on Saturday mornings for a reason.

As a personal trainer, he clearly puts a lot of thought and care into designing individualized programs. During our sessions he pushed me to work hard and helped me overcome mental blocks with weight training.

Overall, I’d highly recommend Eric to anyone. He’s an excellent coach and trainer who genuinely cares about helping people reach their goals.

Source: Google

★ 5

Source: Google

★ 5

Source: Google

★ 5

KO Fitness VA is hands down the best boxing gym in Northern Virginia and the DMV area! Eric is not only highly skilled but also incredibly supportive, creating a motivating and welcoming atmosphere for every fitness level. Whether looking to get in shape, learn real boxing techniques, or join a positive community, this gym delivers results. The classes are challenging and fun, with personalized attention that pushes beginners and experienced athletes alike to improve. Facilities are always clean and the schedule is flexible – perfect for anyone with a busy lifestyle. If seeking a top-rated boxing and fitness experience in the DMV, KO Fitness VA should be the first choice. Highly recommended for kids, adults, and anyone looking to level up their fitness or boxing skills!

Source: Google

★ 5

The best in the area!! I’ve known Eric since the amateur fighting days. He knows what he is doing so if you are trying to ACTUALLY learn, this is the spot for you. If you are just in it for cardio this is still a great spot for you, you will just get the added benefit of being taught properly how to defend yourself. This isn’t a gym about looking cool for instagram or faking the grind. You will put work in and Eric will be on top of you the whole time, and you will get results. Also you won’t have more fun with any other crew of people in the gym, everyone who takes his classes is family! 10/10 recommend!

Source: Google

★ 5

My 14-year-old has been training with Eric and it has been such a positive experience from the moment we walked into the gym. Not only is he learning boxing technique but also gaining discipline and confidence as he progresses . He looks forward to every session and the growth we’ve seen already is amazing. We’re so grateful to have found a trainer that provides excellent coaching and is such a positive role model in the gym. I would recommend Eric to anyone!

Source: Google

★ 5

I’ve been training with Eric for a few months and I can honestly say he’s one of the best boxing coaches out there. He combines deep knowledge of technique with an encouraging style that pushes you to improve without ever feeling overwhelming. Every session is well-structured, challenging, and tailored to my goals — whether it’s building fitness, sharpening my skills, or just getting a great workout.

Eric has a great eye for detail; he spots small adjustments that make a huge difference in form and power. On top of that, his energy and positivity make training something I look forward to every week. Whether you’re a beginner looking to learn the fundamentals or an experienced boxer wanting to level up, Eric’s training is the real deal. Highly recommend!

Source: Google

★ 5

It all starts with Eric Hernandez. He has a combination of knowledge and experience in the sport of boxing that he is willing to share with those who put in the effort. His approach to training is adapted to all levels of skill and fitness, which creates a great environment for all who enjoy participating in the sport for the purpose of staying fit. You couldn’t find a better place to train with a great group of people! Highly recommend!

Source: Google

★ 5

Going to Knockfitness the best part of my week! Eric and Joel are not only a skilled pro boxers but also fantastic trainers. They have a real talent for breaking things down, motivating you, and building your confidence every single class. You leave feeling stronger and better about yourself every time. The gym is clean, welcoming, and has a great variety of equipment that keeps workouts interesting. Couldn’t ask for a better environment or trainers. Highly recommend

Source: Google

★ 5

Eric is an outstanding boxing trainer who brings both passion and professionalism to every session. He has a unique ability to connect with everyone he works with, no matter their skill level, and makes each person feel comfortable while pushing them to reach their full potential. His knowledge of boxing, attention to detail, and motivational style create an environment where growth is guaranteed. Beyond training technique and conditioning, he truly cares about the people he coaches, which shows in the respect and trust he’s earned from the entire gym community. Eric is not just a great coach he’s a mentor and a role model who helps people get better in and out of the ring.

Source: Google

★ 5

Eric is the best of the best when it comes to boxing personal training. Whether you’re looking to get in shape in a fun way, learn the sweet science of real boxing from a seasoned professional fighter, or cross train for other sports, he has got you covered. He is also great with athletes of all ages from kids to older adults. He makes the workouts enjoyable while also pushing you to make sure you’re learning and accomplishing your personal fitness goals. He’s very professional, trustworthy, and very knowledgeable when it comes to fitness/health goals. If you’re looking for a boxing trainer in Northern Virginia, you found the right person! Knockout fitness 5/5!

Source: Google

★ 5

Eric with Knockout Fitness is excellent. He makes people from all walks of life feel welcome with his charisma and friendly approach. At the same time, he’s full of knowledge when it comes to fitness and boxing. With numerous fitness credentials, 20 years of boxing experience, and an active career as a successful professional boxer, he brings a level of expertise that’s unmatched. There’s nowhere else to go, Knockout Fitness is the best!

Source: Google

★ 5

Knockout Fitness is THE place to go for the best boxing and fitness classes in Northern Virginia. Not only do you learn the fundamentals and basics of boxing, you can progress to more in depth classes and lessons, making you one dangerous person. Eric's programs (workouts and also nutrition) helped me lose over 30lbs, helped me be more confident in myself and also has taught me that if you trust in Kofitness, you'll achieve the goals you set for yourself! #StayDangerous

Source: Google

★ 5

Eric’s such a great coach! Can’t wait to go back and take more classes!

Source: Google