Class · Diamond Bar
Train strong.
Live better.
Live better.
est. 2026
Power Karate is a fun, challenging martial arts workout for adults who want to get in shape, learn useful skills, and enjoy training again. You’ll move, sweat, hit pads, work with partners, build confidence, and train in a small adult group; with no forms to memorize and no kids’ class atmosphere.
You come in after work. You move. You sweat. You hit pads, work with partners, learn something useful, and get out of your head for a while. You leave tired, clearer, and glad you showed up. That is the Karate Life we mean.
Power Karate is our expression of that idea: a fun, challenging adult class that builds fitness, confidence, discipline, useful skill, and a real sense of progress.
A lot of adults want to try martial arts, but they do not want to feel out of place in a kids’ program, and they do not want to walk into a room that feels intimidating before they even start.
Power Karate is the third option: a mature, friendly adult class where you can get a great workout, learn real martial arts skills, and enjoy the process without ego or intimidation.
New students get a clear path in. Experienced martial artists still have plenty to work on. Everyone trains at the same goal: move better, get stronger, learn useful skills, and keep improving.
Every class gives you a mix of movement, skill, partner training, and conditioning. You will sweat, learn, laugh, get challenged, and leave with the feeling that you did something worthwhile.
Get a full-body workout that builds strength, mobility, balance, coordination, cardio, and durability; without staring at a treadmill or counting random reps.
Partner drills teach focus, awareness, timing, and the ability to stay calm when things get uncomfortable; one step at a time.
Learn how to strike, move, defend, hit pads, work with partners, keep your balance, and fall safely; skills you can feel improving week by week.
Confidence comes from doing hard things in a supportive room. You show up, train, improve, and start carrying yourself differently.
Classes are active, focused, and partner-based; but the room is friendly. Some nights are technical. Some nights are sweaty. Some nights are playful. You will work hard, but you should also enjoy being there.
Start with mobility, footwork, balance, and coordination so your body wakes up and gets ready to work.
Learn striking, defense, timing, pad work, and partner drills in clear pieces you can actually practice.
Work with other people so you learn distance, timing, awareness, and confidence; without being thrown in over your head.
Build strength, cardio, mobility, and resilience through training that feels more interesting than a normal workout.
Finish tired, clearer, and better than when you walked in. Then come back and do it again.
You do not need prior martial arts experience to start. Classes are taught in plain English, built around simple drills, and designed so you can understand the movement, feel the difference, and improve over time.
Power Karate is our adult martial arts class in Diamond Bar. It is practical, physical, and partner-based; designed to help adults get in shape, build confidence, learn useful skills, and enjoy training again. Classes include movement, striking, pad work, partner drills, simple throwing skills, conditioning, and controlled contact, all introduced progressively in a respectful training environment.
Shinkenpo is the martial arts method behind Power Karate. It gives the class its structure: strong basics, practical partner training, progressive challenge, and respect for the long-term growth of the student. In simple terms, Power Karate is the class you attend. Shinkenpo is the method that guides the training.
“Power” in Power Karate is not about overpowering other people. It is about building the strength, confidence, and calm to feel more capable in your own life.
You train to move better, stand taller, handle stress better, and keep showing up when things get difficult. The power we train for is not just for the mat. It is for your health, your confidence, your work, your family, and your everyday life.
Steven Resell has spent more than four decades training, teaching, and studying martial arts across Kenpo, Karate, Jeet Kune Do, Japanese Jujutsu, Judo, and other arts.
But Power Karate is not about collecting styles. It is about helping adults train intelligently, build real skill, and stay in the game for the long run.
Every Power Karate class is taught personally by Steven in a small-group setting, so students get direct coaching, clear progression, and training adjusted for real adult bodies.
Small-group adult classes are now forming in Diamond Bar. The first week is free, the schedule is simple, and the training is month-to-month with no long-term contracts.
Power Karate is built for adults with real lives, real jobs, and real bodies. Some people come in brand new. Some trained years ago and miss it. Some are bored with regular workouts and want something more engaging. Some already train and want a fresh challenge.
Complete beginners
For adults who want a serious, respectful place to start — without being thrown into a room full of kids or pushed into contact before they are ready.
Returning martial artists
For people who used to train and miss having a place to move, sweat, learn, and sharpen their skills with other adults.
Adults bored with the gym
For people who want to sweat, learn, and have fun doing something that feels more alive than reps on a machine.
Experienced martial artists
For people already training in another art who want to improve their striking, movement, conditioning, timing, and confidence in partner-based practice.
What our students say...
"I would definitely recommend anyone to train under Sensei Steve, you could learn so much and have so much fun at the same time. So if you want to train hard and challenge yourself this is the place for you!"
"Steven is an incredibly passionate person who imparted his knowledge and experience in both martial arts and life to me as a student. Everyone is dedicated to both learning and growth as a group, and as individuals. Great people, great atmosphere, great experience. 5 out of 5 stars. "
"I’ve trained a number of different martial arts under a number of great instructors, but Sensei Steve provide a truly unique experience. Whether you are looking to be a more skilled martial artist, get into shape, learn practical self defense, or just train with great people in a no ego environment, I can’t recommend it enough!"
"Sensei Steven is very knowledgeable in the Martial Way. My experience with him whenever we train together always leaves me wanting more, as he not only a great instructor but truly a very “nice guy”. Great training space, great instructor and a great experience to be had by all who train with him!"
Have questions before coming in? Send us a quick note and tell us a little about your experience level, goals, or concerns. We’ll help you figure out whether Power Karate is a good fit and what your first visit would look like. No pressure. No hard sales pitch. No commitment..