United Studios of Self Defense Yorba Linda
4965 Yorba Ranch Rd, Yorba Linda, CA 92887
About
United Studios of Self Defense Yorba Linda offers Karate classes that include bully-prevention, women's self defense, weapons training, and karate stunt training. The program combines personal instruction with group classes and offers age-specific classes for kids, teens, and adults. New students receive a complimentary personal first lesson.
• Ages: 5–18 years old
• Schedule: Class options Monday–Saturday during afternoon and evening hours
• Price: Start for $99: discounted month that includes uniform & belt, 4 private lessons, and unlimited group classes
United Studios of Self Defense Yorba Linda has been serving Yorba Linda since 1993 and has more than 30 years as a go-to studio for Karate in Yorba Linda, the Canyon Communities, and the rest of North Orange County. The dojo is described as award-winning, with a community-driven dojo culture, and holds a 5.0 rating on Google and Yelp with over 25 reviews. The mission states that every class is a step toward greater strength, sharper skills, and unshakable confidence for kids, teens, and adults, and that the dojo believes martial arts is the perfect vehicle for self improvement.
The leadership team includes Chief Instructor Trent Zappen, who has over 42 years of martial arts experience and is a 5th Degree Black Belt. Assistant Instructor Matthew Genadry is a 3rd Degree Black Belt with 16 years of experience, Assistant Instructor Tanner Diaz is a 2nd Degree Black Belt with 16 years of training, and Assistant Instructor Cat Sayasith is a 2nd Degree Black Belt with 19 years of training. The program is an approved vendor for Cabrillo Point Academy, Pacific Coast Academy, and Suncoast Preparatory Academy.
Testimonials describe the studio as welcoming to people of all ages and praise the senseis as world class and teaching valuable life lessons, with parents noting physical and emotional benefits and increased confidence for their kids. One parent reports that their son attends at least four times a week and that every sensei is “beyond amazing.” Another long-time student shares that they started training there at age 9, continued into adulthood, and call the dojo a second home where they built lifelong friendships, grew in confidence, and learned about leadership.
Last updated August 9, 2026.
• Ages: 5–18 years old
• Schedule: Class options Monday–Saturday during afternoon and evening hours
• Price: Start for $99: discounted month that includes uniform & belt, 4 private lessons, and unlimited group classes
United Studios of Self Defense Yorba Linda has been serving Yorba Linda since 1993 and has more than 30 years as a go-to studio for Karate in Yorba Linda, the Canyon Communities, and the rest of North Orange County. The dojo is described as award-winning, with a community-driven dojo culture, and holds a 5.0 rating on Google and Yelp with over 25 reviews. The mission states that every class is a step toward greater strength, sharper skills, and unshakable confidence for kids, teens, and adults, and that the dojo believes martial arts is the perfect vehicle for self improvement.
The leadership team includes Chief Instructor Trent Zappen, who has over 42 years of martial arts experience and is a 5th Degree Black Belt. Assistant Instructor Matthew Genadry is a 3rd Degree Black Belt with 16 years of experience, Assistant Instructor Tanner Diaz is a 2nd Degree Black Belt with 16 years of training, and Assistant Instructor Cat Sayasith is a 2nd Degree Black Belt with 19 years of training. The program is an approved vendor for Cabrillo Point Academy, Pacific Coast Academy, and Suncoast Preparatory Academy.
Testimonials describe the studio as welcoming to people of all ages and praise the senseis as world class and teaching valuable life lessons, with parents noting physical and emotional benefits and increased confidence for their kids. One parent reports that their son attends at least four times a week and that every sensei is “beyond amazing.” Another long-time student shares that they started training there at age 9, continued into adulthood, and call the dojo a second home where they built lifelong friendships, grew in confidence, and learned about leadership.
Last updated August 9, 2026.
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