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Your Trusted Martial Arts & Fitness Partner in Upland, CA
At Power Of One Martial Arts, we are dedicated to helping individuals of all ages reach their full potential through martial arts and fitness training. Our expert instructors combine decades of experience with a personalized approach to instill discipline, confidence, and physical strength in every student. We prioritize creating a supportive environment where students learn life skills such as respect, focus, and perseverance while achieving their personal goals.

Our programs are tailored to address the unique needs of children, teens, and adults, ensuring each participant gains the tools to succeed both inside and outside the dojo. With a focus on community and continuous improvement, we empower students to overcome challenges and build lasting character traits that extend beyond martial arts training.
Services
Kids Martial Arts Teens Martial Arts Adult Martial Arts Kickboxing Self-Defense Training
Highlights and features
  • Our instructors have decades of experience training students in martial arts and fitness.
  • We provide a supportive community that fosters personal growth and teamwork.
  • Programs are tailored to help students achieve specific goals like confidence or fitness.
  • We emphasize real-world applications of martial arts techniques for self-defense.
  • Our classes combine physical training with mental discipline and character development.
What people say
Expert instructors Patient with kids Improved physical abilities Supportive environment Exceptional training variety
Services
Kids Martial Arts
Our Kids Martial Arts program teaches children aged 712 essential life skills like discipline, focus, and respect while improving physical coordination and strength. Through structured classes, students learn self-defense techniques and build confidence in a supportive environment. The curriculum emphasizes teamwork, perseverance, and goal-setting, helping children thrive academically and socially.
Teens Martial Arts
Teens Martial Arts classes for ages 1315 focus on developing self-discipline, leadership, and physical fitness. Students learn practical self-defense skills while building resilience to peer pressure and stress. The program encourages goal-setting and accountability, fostering confidence and respect through structured training and collaborative learning.
Adult Martial Arts
Adult Martial Arts classes provide a full-body workout while teaching effective self-defense techniques. Participants improve strength, flexibility, and mental focus through dynamic training routines. The program emphasizes practical applications for real-world scenarios, empowering adults to protect themselves and build self-confidence.
Kickboxing
Kickboxing classes combine high-energy cardio workouts with martial arts techniques to improve endurance, strength, and coordination. Students learn punches, kicks, and defensive moves in a fun, group setting. The program promotes stress relief, weight loss, and overall physical conditioning for all fitness levels.
Self-Defense Training
Self-Defense Training equips students with practical techniques to protect themselves in real-life situations. The curriculum focuses on situational awareness, de-escalation strategies, and physical defense maneuvers. Classes emphasize mental preparedness and confidence-building to empower individuals of all ages.
People
Jeremy Castillo
Owner & Instructor
Jeremy Castillo is the owner and lead instructor at Power Of One Martial Arts, with extensive experience training students of all ages. He emphasizes character development alongside martial arts skills, fostering confidence, discipline, and respect in every class.
Jessica (Miss J)
Instructor
Jessica, known as Miss J, is a knowledgeable and patient instructor specializing in teaching children and teens. Her expertise in martial arts and dedication to student growth create a positive learning environment that prioritizes technique and personal development.
Questions
What benefits do martial arts classes offer for children?
Our classes teach discipline, focus, and respect while improving coordination, strength, and social skills. Children learn to overcome challenges and build confidence in a structured environment.
Can martial arts help teens with self-esteem and decision-making?
Yes. Teens develop self-respect, accountability, and judgment through goal-setting and structured training, which translates to improved confidence and better life choices.
Are classes available for beginners?
Absolutely. Our programs cater to all skill levels, including beginners. Instructors adapt lessons to individual needs, ensuring a welcoming environment for new students.
What should I wear to my first class?
Wear comfortable workout attire like sweatpants and a t-shirt. Bring water and a towel. No special equipment is required for the initial sessions.
Do you offer family discounts or trial classes?
We provide exclusive online offers and flexible pricing options. Contact us directly to inquire about current promotions and trial class availability.