• Defy Fitness Napa Valley California Logo

    Everything you know about fitness is about to change! (in a really good way)

    Amazing results! Ultra efficient workouts!

    Looking for a new gym?

    Defy fitness is Napa's only ARX smart gym. We offer motorized resistance for weight loss, body sculpting and bone density. Body building and lean muscle gain.


    ARX technology uses computer-controlled, motorized resistance that is capable of matching the force of any user 100% of the time. This gives you the perfect rep, every rep. With perfect resistance, ARX shortens the time you need to exercise while dramatically increasing the safety and effectiveness of all of your workouts.


    Want to lose weight? Want to become ridiculously stronger? Need to build new muscle or increase bone density? Thinking about joining a gym or health club and thinking "who even has time for that?" Then ARX will be a perfect fit for you! You will find that ARX saves you an incredible amount of time. The future of fitness is ARX and it is available right now! Right here! In Napa!


    ARX can benefit everyone from high school athletes to senior citizens. Just what the doctor ordered! That's right, ARX is a rehabilitation tool! Because ARX measures everything, bio-hackers and athletes of all kinds can geek out on the massive amounts of data never available until now. ARX will improve your body more efficiently and we can prove it!

  • What is adaptive resistance exercise?

    Click on the video links to learn more. Free demo sessions available, hit the "Free Trial Click Here" button.

  • Tutorials

    Demonstration videos of the exercises that can be performed.

  • Adaptive Resistance Bike CAR.O.L

    Unmatched heart pounding cardio workout! (no sweat required)

    cardiovascular optimization Logic

    Fat burn protocols to accelerate weight loss!

  • Napa's 1st Fit 3D scanner

    Yet another way to prove the effectiveness of ARX. Free for members to use.

    Fit 3D scanner for complete tracking of body composition changes

    For best results please bring proper scanning attire as shown.

    Lots of data! 3d avatar with body composition and measurements.

    You will change your body and we will prove it!

  • Defy fitness Napa valley - By definition it is what we do!