Personal Trainers Irvine, Newport Beach, Costa Mesa & Orange County
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 Fitness by Kai Orange County is a one on one, group class and semi private personal training service who strives to help residents of Newport Beach and Orange County. We have some of the most elite trainers in Irvine and Orange County with top not top level education, but most importantly top notch experience. None of our personal trainers are fly by night and they all do this for a living not a side gig. With over 45 years of combined experience our company prides itself on top quality knowledge and training experience. Our work ethic and care put forth towards our personal training clients and profession is unparallelled. Our certified personal trainers have a burning passion for fitness and have a desire to share it with all who are ready to commit to a healthy lifestyle. Fitness by Kai is closely connected to Newport Beach, Huntington Beach, Anaheim, Irvine and Costa Mesa, but our team can travel to your nearest outdoor park or community gym any where in the Orange County vicinity.
Group Classes

Group Classes

Join our high energy group classes that are led by various coaches/instructors for those who are looking to be challenged and motivated by others who share the same goals and passion!
Personal Training

Personal Training

Fitness by Kai by offers some of the best personal trainers in Orange County. All of our trainers are certified and have different skill sets in order to provide our clients options in training style. Half of our staff have been trusted by Nike and Asics to lead some of their training modules!
New State of The Art Gym

New State of The Art Gym

Fitness by Kai has a new look with everything you need to reach your fitness goals. Boasting some of the best personal training equipment in Orange County and Irvine with a private and personal touch.


Fitness by Kai was began on the foundation of spreading knowledge to those who are sick of an industry that is saturated with high turnover, get thin quick fads and where the meat market mentality is the norm. Our staff strives to set Fitness by Kai apart by providing sustainable methods to help you for years to come, in a positive and supportive environment by professional trainers who care. Each member of our staff has had success in transforming themselves at one time or another and have over 250 hours of training experience at minimum. Therefore, we understand what it takes mentally and physically to get you where you need to be.

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Meet The Trainers

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