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FitTheorem - Lynnwood

4.7 ★★★★★ 344 Google reviews · Kickboxing gym in Lynnwood, Washington

Kickboxing gym Beginners welcome Kids & teens Cardio kickboxing

Fitness center featuring kickboxing routines, cardio workouts, and strength training programs.

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
  • Kids & teen classes kids and teen kickboxing classes — built around confidence, focus, and fun
  • Today see hours ·
  • Website & schedule fittheorempnw.com — book classes and see the live schedule
  • Phone +1 425-361-7563

Hours

Monday 4:45 am–8:30 pm
Tuesday 4:45 am–8 pm
Wednesday 5:45 am–8 pm
Thursday 4:45 am–8 pm
Friday 5:45 am–7 pm
Saturday 7 am–2 pm
Sunday 8:30 am–2 pm

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 FitTheorem - Lynnwood, confirmed in members' own reviews and the gym's own info — not guessed from the sign out front.

🔥 Cardio Kickboxing 4 mentions

“The kickboxing sessions delivered a high-energy cardio experience, accelerating my metabolism, incinerating calories, and sculpting my physique.”

All gyms that run cardio kickboxing →

🌱 Beginners 2 mentions

“She is highly skilled and explains techniques clearly, making it easy for beginners to follow along while still challenging more advanced students.”

All gyms that run beginners →

🥊 Boxing 2 mentions

“🥹 My overall experience has been phenomenal, I NEVER thought I was going to get into any kind of boxing because I’m a lover not a fighter but this has been so fun!”

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 FitTheorem - Lynnwood — mined from their reviews and the gym's own info.

🥊 Boxing 2 mentions

“🥹 My overall experience has been phenomenal, I NEVER thought I was going to get into any kind of boxing because I’m a lover not a fighter but this has been so fun!”

Other gyms that also teach boxing →

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 344 Google reviews — in their own words.

🌱 welcoming to beginners 8 mentions

“Kim was welcoming, professional, and did an amazing job explaining the movements and technique in a way that made the workout both challenging and enjoyable.”

🎉 fun, high-energy classes 4 mentions

“The kickboxing sessions delivered a high-energy cardio experience, accelerating my metabolism, incinerating calories, and sculpting my physique.”

⚖️ great for weight loss 4 mentions

“Through FitTheorem's (Lynnwood) 6-week challenge, I successfully attained my weight loss objectives.”

🧼 clean, well-equipped gym 4 mentions

“The gym itself is clean and well-equipped, fostering a supportive community atmosphere.”

🧠 builds confidence & relieves stress 3 mentions

“I now have more confidence, motivation, and knowledge than I did when I first walked in the door.”

🤝 friendly, family gym 10 mentions

“Kim was welcoming, professional, and did an amazing job explaining the movements and technique in a way that made the workout both challenging and enjoyable.”

From the reviews

I just finished the 6 week challenge! Honestly, before joining FitTheorem, I didn’t believe it when people said that they got all of their fitness needs through kickboxing. I’m also the type of person who likes to change up my workouts all the time, so I thought that by doing "just" kickboxing would get boring to me.

★★★★★ — Jenny, Apr 2024

I have been going to this gym for over a year, a great place to start my fitness goal. The gym is welcoming to people of all backgrounds and fitness levels. Instructors are great especially Nathalie. I would rate Nathalie's kickboxing classes at 5 out of 5 stars. She keep the class motivated and energized.

★★★★★ — Kumudra, Aug 2024

I was a little nervy to come into the gym because I had never been into a kickboxing gym but the first person that greeted me was Coach Kierra! She was so nice & so sweet, she took the time to meet with me soon as I got there & tell me more about what they offer/what they do!

★★★★☆ — Samantha, May 2025

I had a great experience during the six week challenge with FITT. They edited the challenge to better fit what my body needed, and it was a fun and challenging experience overall. Ryan was a great help as a nutrition coach as changing my diet was definitely what helped me be successful the most.

★★★★★ — Gabe, May 2024

Excerpts from public Google reviews. Read all 344 reviews →

New to kickboxing? Start at FitTheorem - Lynnwood

FitTheorem - Lynnwood 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 FitTheorem - Lynnwood

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 when you call. 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 FitTheorem - Lynnwood

19230 Alderwood Mall Pkwy #160, Lynnwood, WA98036

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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.