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N-Flux

5 ★★★★★ 83 Google reviews · Kickboxing gym in Washington, District of Columbia

Kickboxing gym Beginners welcome Cardio kickboxing Competition team

Plan your first class

  • Beginner-friendly all fitness levels welcome, including total beginners — no experience needed, and you get in shape by training, not before
  • Cardio kickboxing classes high-energy cardio kickboxing on the bags and pads — a fun, sweaty workout built for fitness and weight loss, at your own pace
  • Sparring sparring and partner work for members who want it — always optional, eased in gradually, with the coach controlling the contact
  • Competition team a competition team for members who want to test themselves in the ring — amateur kickboxing, muay thai, or K-1
  • Today see hours ·
  • Website & schedule staynflux.com — book classes and see the live schedule

Hours

Monday 7 am–8 pm
Tuesday 7 am–8 pm
Wednesday 7 am–8 pm
Thursday 7 am–8 pm
Friday 7 am–7 pm
Saturday 9 am–12 pm
Sunday Closed

Hours shift for holidays and class-schedule changes — worth a quick check before a special trip.

The classes they run

Kickboxing classes on the schedule at N-Flux, confirmed in members' own reviews and the gym's own info — not guessed from the sign out front.

🔥 Cardio Kickboxing 6 mentions

“The classes at N-flux are a great workout, but they don’t feel like one; they’re not boring or repetitive and they’re always improving.”

All gyms that run cardio kickboxing →

🌱 Beginners 11 mentions

“Even when I was brand new, I always felt welcome in the space and it was really nice to have that since I was relatively new to DC when I started taking classes.”

All gyms that run beginners →

🤜 Sparring 3 mentions

“As you progress into the higher levels, Chris makes sure that you don't get bored by incorporating sparring and weapons training that is of great benefit, and a whole lot of fun!”

All gyms that run sparring →

🥊 Boxing

“I would also strongly recommend the other classes offered by the studio - boxing, kickboxing, grappling (ground fighting), sparring, and urban ninja (strength/conditioning).”

All gyms that run boxing →

Other martial arts here

Kickboxing gyms are usually multi-discipline. Here's what else members mention training under the same roof at N-Flux — mined from their reviews and the gym's own info.

🥊 Boxing

“I would also strongly recommend the other classes offered by the studio - boxing, kickboxing, grappling (ground fighting), sparring, and urban ninja (strength/conditioning).”

Other gyms that also teach boxing →

🥋 Brazilian Jiu-Jitsu 8 mentions

“I would also strongly recommend the other classes offered by the studio - boxing, kickboxing, grappling (ground fighting), sparring, and urban ninja (strength/conditioning).”

Other gyms that also teach brazilian jiu-jitsu →

🛡️ Self-Defense 25 mentions

“I took the Guerrera Self Defense Intensive workshop in July, and I HIGHLY recommend it for those who want to get a basic understanding of multiple self-defense concepts.”

Other gyms that also teach self-defense →

Disciplines are mined from reviews and the gym's own info — they show what members have trained, not a formal class guarantee. If you specifically want muay thai, boxing, or MMA alongside your kickboxing, confirm the current schedule with the gym.

What members say

The things reviewers bring up again and again across 83 Google reviews — in their own words.

🧑‍🏫 expert, motivating coaching 4 mentions

“Chris and Colleen are excellent instructors who have created a space that is inclusive and encouraging while simultaneously placing great focus on technique and safety.”

🌱 welcoming to beginners 17 mentions

“Even when I was brand new, I always felt welcome in the space and it was really nice to have that since I was relatively new to DC when I started taking classes.”

🎉 fun, high-energy classes 7 mentions

“If you’re looking for an engaging, challenging, and fun workout where you will see real progress week by week, this is the place for you.”

💦 killer cardio workout 8 mentions

“I would also strongly recommend the other classes offered by the studio - boxing, kickboxing, grappling (ground fighting), sparring, and urban ninja (strength/conditioning).”

💵 good value / fair pricing 3 mentions

“Be prepared to work hard, the payoff is well worth it!”

💗 welcoming to women 12 mentions

“I took the Guerrera Women and Femme Self-Defense course and walked away in only one weekend feeling more empowered and safer taking up space in the world.”

From the reviews

There is no way that a review can convey how excellent N-flux is but I will give it my best try. I have been training at N-flux for almost 7 months now, and my classes there have quickly become one of my favorite parts of my week. The training curriculum is excellent, and holistic in approach.

★★★★★ — Gabriela, May 2019

I have been at N-Flux for almost 9 months (amid a pandemic also) and I have to say this gym is amazing. I am very particular about environment and atmosphere of a gym and this place has a great one. Everyone is so welcoming and friendly who all want to work hard.

★★★★★ — Corey, Dec 2020

I took Colleen’s Women’s and Femme’s Self Defense Intensive and loved it. First, Colleen is an amazing person and I want to be her best friend. Second, the self-defense weekend was incredible and I truly think I’m better for it. Colleen has designed the curriculum with both practicality and thoughtfulness in mind.

★★★★★ — Katherine, Mar 2024

I've been going to N-Flux for a couple of months now and cannot recommend it highly enough. It only took one class for me to know that I'd found someplace great to learn.

★★★★★ — Megan, May 2019

Excerpts from public Google reviews. Read all 83 reviews →

New to kickboxing? Start at N-Flux

N-Flux comes up as a beginner-friendly gym — noted on their own site. If you've never thrown a punch or a kick, that's exactly who a good beginners class is for. A few things worth knowing before your first week. First, you don't need to be fit or coordinated to start — you get in shape by training, not before it, and coaches scale every drill to you. Second, you won't be thrown into hard sparring — reputable gyms build the basics (stance, footwork, and punches and kicks on pads and bags) first, and any contact eases in gradually under a coach's control. Third, all fitness levels really are welcome — ask about a dedicated beginners or fundamentals class time so your first session is alongside others who are also starting out. Most gyms are happy to let you watch or try a class first, so reach out before you commit.

Check beginner classes on their site

Your first kickboxing class at N-Flux

Nervous about walking into a kickboxing gym for the first time? Almost everyone is, and good coaches expect beginners to come through the door. Here's what to know. What to expect: a typical first class is a warm-up, then drilling the basics — stance, footwork, and punches and kicks on pads or a heavy bag — not hard sparring. Go at your own pace and rest whenever you need to; no one will bat an eye. What to wear: comfortable athletic clothes you can move and sweat in, and supportive trainers. What to bring: water, and hand wraps and gloves if you have them — many gyms lend loaner gloves for a first class, so it's worth asking. As you keep training you'll add your own gloves and wraps (and shin guards once you start sparring). Sparring is optional and eases in gradually, once your basics are solid. Arrive 10–15 minutes early to sign a waiver and meet the coach. It gets easier fast — most people feel far more at home by their third class.

Kickboxing is a contact sport. Warm up, pace yourself, listen to your coaches, and if you have any injuries or health concerns, mention them before class and check with a doctor if you're unsure.

Where to find N-Flux

1722 I St NW, Washington, DC20006

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Listing verified July 2026 from public business records and member reviews. Something out of date? Report a correction. Own this gym? Claim your listing — it's free.