In light of the Coronavirus (COVID-19) situation, One World remains temporarily closed from 3/16/20 until further notice. We will reopen as soon as permitted.

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Welcome to One World Self Defense and Fitness

We are the East Bay’s Premier Self-Defense and Fitness School

Founded in 2005, Our facility is over 10,000 square feet of gym floor equipped with state of the art Self Defense and Fitness it equipment. We have a fully equipped locker room complete with showers, and a fitness and self-defense pro-shop. Our gym is family-oriented where you will train in a safe environment with certified, top notch Instructors.

Drop in or call us at (510) 324-8153 to schedule a tour of our Facility today!

Our Mission

Our mission is to teach you the skills to gain the confidence you need to defend yourself and those around you. We do that in a family friendly environment where you can get fit and strong and have fun in the process.

Bring your Self-Defense and Fitness Goals to a brand new level!

Our Training Programs

Contact Us

One World Self Defense and Fitness
33415 Western Avenue Union City, California 94587

(510) 324-8153

Business Hours

Monday05:30 AM09:00 PM
Tuesday06:30 AM09:00 PM
Wednesday05:30 AM09:00 PM
Thursday06:30 AM09:00 PM
Friday05:30 AM09:00 PM
Saturday06:30 AM01:30 PM
Sunday10:30 AM01:00 PM

Common Questions

Do you have setup fees or contracts?

We do not have a setup fee. If you are new to Crossfit, we require you to attend the 10- one hour Private Sessions so you can learn the fundamental movements before you can safely participate in a class.

What is the billing cycle?

  • Month to Month Commitment
  • 3 Month Commitment
  • 6 Month Commitment
  • 1 Year Commitment

Inquire about our First Responders and Military Discounts


What They Say About Us

“I have never been more motivated, seen results quicker, or felt stronger than I do now.

Carl T. Mosby III

“If anything can wake me up at 6am to hit the gym, it’s been Crossfit One World


“I’m in the best shape of my life thanks to One World!


“They push you hard because they believe in you.

Ryka H.

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