Sleeping Tiger Fitness

Build strength, confidence, & Resilience

serving the north shore, MA


Training With Nathan Zimmerman

Move better, feel better, and carry yourself with confidence with our growing ninja family. Locally owned & operated.

Whether you’re looking for fitness classes, martial arts, or a blend, we have plenty of programs to choose from and getting started is easy.

Your first class in any program is free. We can’t wait to meet you!


Let’s GO

better together

krav maga martial arts gym north shore

Foundations. Partnership. Results.


BMT is a rigorously developed striking system created by Sensei Duane “Bang” Ludwig and informed by UFC Hall-of-Famer Bas Rutten.  It incorporates elements of Muay Thai, Dutch Kickboxing, American Boxing, and traditional martial arts to culminate in a world-class striking system that has helped top MMA and UFC fighters such as TJ Dillashaw win championships.


Krav Maga is a practical and tactical system that teaches how to prevent, deal with, and overcome all kinds of violence and attacks. It prepares students for real life self defense situations. Krav Maga techniques are based off of instinctive responses, which make them easier to learn. This program allows students to get fit while also learning skills and techniques that could one day save their life. This membership includes Boxing and Kickboxing classes.


Sleeping Tiger Fitness offers group classes in all programs, as well as some online training and custom private training with owner Nathan Zimmerman. Get in touch to learn more!

Come in!

Your first class is free


Come meet the owner, coaches, & other members


Learn about different available programs


Choose a class schedule that works for you



krav maga martial arts gym north shore

Join the Family

Testimonials from members

Sleeping Tiger Fitness was built on the desire to make the gym a home to everyone. We are committed to making sure our members are safe, comfortable, heard, and happy to be here. 


Member for 6+ years, Kettlebell+Barbell programs


Member for 6+ years, Strength+Boxing programs


Member for 5+ years, Kettlebell program


Member for 6+ years, Strength program

foundations. partnership.

growth. results.



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