Home - At Karate Fit USA, the focus is YOU! | Lawrenceville, NJ

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At Karate Fit USA,
the focus is YOU!

ASK ABOUT OUR NEW STUDENT INTRO OFFER!

We offer small class sizes and age and level-based skills.  If you learn better with structure and attention, you should enjoy training with us! We currently have students from ages 3 to 74, grouped by age and experience to focus on appropriate content. Whatever your starting point, we will help you meet and exceed your goals!

We are a longstanding independent Lawrenceville martial arts academy, not a corporate/chain school, and are proud to have been voted "Best Karate School" by Trentonian readers each year we have been here in the LSC!  And we do more than just "karate": Sensei Swingle has multiple black belts and extensive experience in the US and Japan, and as 5th degree Shihan (Master Instructor) has been Head Instructor since 2018. We focus on personal attention and practical techniques, traditional weapons and Small Circle Jujitsu for enjoyable but effective self-defense training: Less fluff, more stuff!  Private lessons also possible.

UPDATE: We are now also offering Jiu jitsu classes with guest instructors to members and nonmembers alike! Reach out for info, or try an Open Mat session Sundays noon-2:00!!

Contact Sensei Swingle with any questions, or send a message via our Public FB page. (We also have private group pages and YouTube channel for members to give extra support and at-home training help.)

You can also text or call 609-690-9060 and someone will respond ASAP!

Preregister for a free trial class HERE, or click the SIGNUP button above!

Instructors

Schedule

List LayoutList Grid LayoutGrid
12/07/2025 - 12/13/2025
7 Sun 8 Mon 9 Tue 10 Wed 11 Thu 12 Fri 13 Sat
7 Sun
8 Mon
9 Tue
10 Wed
11 Thu
12 Fri
13 Sat
12:00am
1:00am
2:00am
3:00am
4:00am
5:00am
6:00am
7:00am
8:00am
9:00am
10:00am
11:00am
12:00pm
1:00pm
2:00pm
3:00pm
4:00pm
5:00pm
6:00pm
7:00pm
8:00pm
9:00pm
10:00pm
11:00pm

Little Ninja Group 1 (3-5 yrs)

5:30 - 6pm
5:30pm - 6:00pm

Little Ninja Group 1 (3-5 yrs)

Little Ninja Group 1 (3-5 yrs)
Monday, December 08 · 5:30pm - 6:00pm
Book

BJJ Mixed Lvl by MattLab

6 - 7pm
6:00pm - 7:00pm

BJJ Mixed Lvl by MattLab

BJJ Mixed Lvl by MattLab
Monday, December 08 · 6:00pm - 7:00pm

KF USA Kyu Testing - see individual schedule

6 - 6:45pm
6:00pm - 6:45pm

KF USA Kyu Testing - see individual schedule

KF USA Kyu Testing - see individual schedule
Monday, December 08 · 6:00pm - 6:45pm

Samurai Beginners - (6-8 yrs)

6:10 - 6:50pm
6:10pm - 6:50pm

Samurai Beginners - (6-8 yrs)

Book 0/14
Samurai Beginners - (6-8 yrs)
Monday, December 08 · 6:10pm - 6:50pm
Book

- - - ADVANCED - - - - - - Samurai - - - (6-8 yrs)

6:55 - 7:35pm
6:55pm - 7:35pm

- - - ADVANCED - - - - - - Samurai - - - (6-8 yrs)

- - - ADVANCED - - - - - - Samurai - - - (6-8 yrs)
Monday, December 08 · 6:55pm - 7:35pm
Book

STRIKING by MattLabs

7 - 8pm
7:00pm - 8:00pm

STRIKING by MattLabs

STRIKING by MattLabs
Monday, December 08 · 7:00pm - 8:00pm

Adult - Basics

7:45 - 8:45pm
7:45pm - 8:45pm

Adult - Basics

Adult - Basics
Monday, December 08 · 7:45pm - 8:45pm
Book

Little Ninja Group 2 (3-5 yrs)

4:45 - 5:15pm
4:45pm - 5:15pm

Little Ninja Group 2 (3-5 yrs)

Little Ninja Group 2 (3-5 yrs)
Tuesday, December 09 · 4:45pm - 5:15pm

- - Youth Karate - - (9-14 yrs)

5:30 - 6:15pm
5:30pm - 6:15pm

- - Youth Karate - - (9-14 yrs)

- - Youth Karate - - (9-14 yrs)
Tuesday, December 09 · 5:30pm - 6:15pm
Book

KF USA Kyu Testing - see individual schedule

6 - 6:45pm
6:00pm - 6:45pm

KF USA Kyu Testing - see individual schedule

KF USA Kyu Testing - see individual schedule
Tuesday, December 09 · 6:00pm - 6:45pm

Advanced Youth (9-14 yrs)

6:30 - 7:30pm
6:30pm - 7:30pm

Advanced Youth (9-14 yrs)

Advanced Youth (9-14 yrs)
Tuesday, December 09 · 6:30pm - 7:30pm
Book

Black Belt Class / Adv Training

7:30 - 8:30pm
7:30pm - 8:30pm

Black Belt Class / Adv Training

Black Belt Class / Adv Training
Tuesday, December 09 · 7:30pm - 8:30pm

Kids BJJ by MattLabs

5 - 6pm
5:00pm - 6:00pm

Kids BJJ by MattLabs

Kids BJJ by MattLabs
Wednesday, December 10 · 5:00pm - 6:00pm

Little Ninja Group 1 (3-5 yrs)

5:30 - 6pm
5:30pm - 6:00pm

Little Ninja Group 1 (3-5 yrs)

Book 0/14
Little Ninja Group 1 (3-5 yrs)
Wednesday, December 10 · 5:30pm - 6:00pm
Book

BJJ Gi Mixed by MattLabs

6 - 7pm
6:00pm - 7:00pm

BJJ Gi Mixed by MattLabs

BJJ Gi Mixed by MattLabs
Wednesday, December 10 · 6:00pm - 7:00pm

Samurai Beginners - - - Weapons - - - (6-8 yrs)

6:10 - 6:50pm
6:10pm - 6:50pm

Samurai Beginners - - - Weapons - - - (6-8 yrs)

Book 0/14
Samurai Beginners - - - Weapons - - - (6-8 yrs)
Wednesday, December 10 · 6:10pm - 6:50pm
Book

ADVANCED Samurai - Weapons (6-8 yrs)

6:55 - 7:35pm
6:55pm - 7:35pm

ADVANCED Samurai - Weapons (6-8 yrs)

Book 0/14
ADVANCED Samurai - Weapons (6-8 yrs)
Wednesday, December 10 · 6:55pm - 7:35pm
Book

Adult - Applications

7:45 - 8:45pm
7:45pm - 8:45pm

Adult - Applications

Book 0/14
Adult - Applications
Wednesday, December 10 · 7:45pm - 8:45pm
Book

Little Ninja Group 2 (3-5 yrs)

4:45 - 5:15pm
4:45pm - 5:15pm

Little Ninja Group 2 (3-5 yrs)

Little Ninja Group 2 (3-5 yrs)
Thursday, December 11 · 4:45pm - 5:15pm

Youth - Weapons (9-14 yrs)

5:30 - 6:15pm
5:30pm - 6:15pm

Youth - Weapons (9-14 yrs)

Book 0/14
Youth - Weapons (9-14 yrs)
Thursday, December 11 · 5:30pm - 6:15pm
Book

Advanced Youth - Weapons (9-14 yrs)

6:30 - 7:30pm
6:30pm - 7:30pm

Advanced Youth - Weapons (9-14 yrs)

Book 0/14
Advanced Youth - Weapons (9-14 yrs)
Thursday, December 11 · 6:30pm - 7:30pm
Book

Adult - Weapons

7:45 - 8:45pm
7:45pm - 8:45pm

Adult - Weapons

Book 0/16
Adult - Weapons
Thursday, December 11 · 7:45pm - 8:45pm
Book

Sparring Class 1 - gear required

6 - 7pm
6:00pm - 7:00pm

Sparring Class 1 - gear required

Book 0/20
Sparring Class 1 - gear required
Friday, December 12 · 6:00pm - 7:00pm
Book

SPARRING CLASS 2 - gear required

7:15 - 8:15pm
7:15pm - 8:15pm

SPARRING CLASS 2 - gear required

Book 0/30
SPARRING CLASS 2 - gear required
Friday, December 12 · 7:15pm - 8:15pm
Book

Adult Combined Fundamentals

9 - 9:45am
9:00am - 9:45am

Adult Combined Fundamentals

Book 0/16
Adult Combined Fundamentals
Saturday, December 13 · 9:00am - 9:45am
Book

Combined - - Youth & - - Adv Youth - - (9-14 yrs)

10 - 10:45am
10:00am - 10:45am

Combined - - Youth & - - Adv Youth - - (9-14 yrs)

Book 0/14
Combined - - Youth & - - Adv Youth - - (9-14 yrs)
Saturday, December 13 · 10:00am - 10:45am
Book

- - Combined LN - - (3-5 yrs)

11 - 11:40am
11:00am - 11:40am

- - Combined LN - - (3-5 yrs)

Book 0/20
- - Combined LN - - (3-5 yrs)
Saturday, December 13 · 11:00am - 11:40am
Book

Combined Samurai (6 - 8 Years)

11:50am - 12:30pm
11:50am - 12:30pm

Combined Samurai (6 - 8 Years)

Book 0
Combined Samurai (6 - 8 Years)
Saturday, December 13 · 11:50am - 12:30pm
Book

BROWN - SHODAN BO TESTING

1 - 3:30pm
1:00pm - 3:30pm

BROWN - SHODAN BO TESTING

BROWN - SHODAN BO TESTING
Saturday, December 13 · 1:00pm - 3:30pm
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We look forward to seeing you soon! Please come 10 minutes early to be ready to go at start time, or 15 minutes early if your first time attending.

Please let us know ahead of time if you are not able to make your scheduled time.

You are now on the waitlist. If a spot opens up we will notify you via Email.

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Kids Martial Arts Classes - try for free!

Kids Martial Arts Classes - try for free!

Thank you for your interest in Children's Karate / Martial Arts Classes. We have separate classes for different age groups and experience levels, allowing us to have group-appropriate content and activities. We also sometimes use our two different rooms to focus on subgroups within a class. Our students learn to protect themselves, express themselves, and grow as people and as martial artists.

We focus on self-development and fitness through self-defense, but in an age-appropriate, safe and fun manner. -This is why some of our Instructors have been with us for 10, 15 and even 20 or more years, often themselves starting as a Little Ninja!

We always offer a free trial, either in their group or private mini-class if preferred, and we offer a New Student Special to allow for an extended risk-free chance to confirm they want to continue training longer-term with us.

Thank you for contacting us. We will follow up with you as soon as we can to answer any questions you might have and to schedule your free trial class! You can also call or text 609-690-9060 for more info, and can pre-register for your trial class at www.karatefitusa.net/signup

Adult Martial Arts - Try a Free Class!

Adult Martial Arts - Try a Free Class!

We offer Adult classes for all ability and experience levels, sometimes using our two rooms and offering variations to challenge Beginners and Advanced students and properly direct the material.

We focus on self-development and fitness through self-defense, but in a safe, fun and effective manner. Our classes include Karate, Weapons and Small Circle Jujitsu techniques, with both solo, partner and group work.  Training brings mental and physical health benefits, and increases confidence to help improve your life outside of karate as well - even if you hopefully never need to use the many techniques you will learn!

Please come in for a free trial, either a regular group class to see what that is all about, or we can also arrange a private mini-class if preferred. We then have a New Student Special to allow for an extended risk-free period to reconfirm you like our approach and look to continue longer-term.

Thank you for contacting us. We will follow up with you as soon as we can to answer any questions you might have and to schedule your free trial class! You can also call or text 609-690-9060 for more info, and can pre-register for your trial class at www.karatefitusa.net/signup