Adult Brazilian Jiu-Jitsu Classes in Riverside

Our daughter is now in her third year at Marcellini's Martial Arts Academy, and we truly couldn’t be happier with the experience. Before finding this academy, we tried several different activities and programs, but nothing really clicked for her. She didn’t feel comfortable or confident — until we met Sensei Sam and the team here. Sensei Sam goes out of his way to make every student feel welcome, valued, and part of a team. That personal attention has made all the difference. Since starting Jiu Jitsu, we’ve seen huge growth in our daughter: Increased confidence Better focus and discipline More calm and thoughtful decision-making Stronger social skills She’s more aware of her surroundings, handles challenging situations better, and isn’t timid about trying new things anymore. Most importantly — she genuinely loves coming to class. If you’re looking for a place that builds both skills and character, this academy is something special. Highly recommend.

Being an older woman, I wasn't sure about starting a martial arts practice, but Sam's emphasis on practicing safely set my mind at ease. He also teaches with lots of patience and precision. Now, almost 2 years later, my practice is going strong. Jiu Jitsu is so much fun at the same time keeps mind and body in top condition!
Sam has trained with some of the best and it's clear that he is fully committed to bringing the highest quality available to his students. The kids are not only taught the martial art skills, but Sam teaches them clarity of mind, kindness and respect for self and others, self control, and honesty. If you want your child to learn M A safely and learn some comprehensive life skills, by a teacher who truly cares about his students, or you are just someone who wants to get the best teaching around, then this is the place to come.

This Jiu Jitsu gym is absolutely top-notch. From the moment you walk in, you’re welcomed into a clean, professional, and friendly environment. Sam Marcellini is incredibly knowledgeable, patient, and genuinely invested in helping every student improve—no matter their experience level. Classes are well structured, challenging, and fun, with a strong emphasis on technique, safety, and respect. The community here is supportive and motivating, making it easy to stay consistent and keep learning. Whether you’re a beginner or an experienced practitioner, this is an excellent place to train and grow. Highly recommend!

I have been training jiu jitsu for over twenty years and let me say the following. I highly recommend the instruction of Sam Marcellini to anyone wanting to learn both the basic and advanced nuances of jiu jitsu. He has an expert understanding of both basic and advanced techniques that will benefit even the most experienced in jiu jitsu. His focus and attention to the most important details is excellent.

Having trained at MMAA since 2002 I can strongly attest to the authenticity and effectiveness of the instruction at this school. Sam Marcellini is an excellent instructor who is a black belt under Royce Gracie. His attention to detail and focus on technical proficiency is definitely top level. Furthermore his ability to instruct kids in detail while maintaining a fun learning environment has created an especially strong kids program. The bottom line is if you want to learn authentic Gracie Jiu-Jitsu with a strong focus on functional street self defense then this is where you want to train.

It is extremely rare that I take the time to leave a review for anything online, but I feel like Marcellini’s Martial Arts is worthy of the time and effort, especially after they have dedicated so much time to my personal and professional growth. I have been training at this location for several years and can speak from experience about MMAA. Sam Marcellini is an amazing instructor with a tremendous amount of experience in the art of Brazilian Jiu Jitsu. He is one of just a handful of black belts under Royce Gracie in California, and his skill is second to none. The facility is always clean, and Sam promotes a friendly training atmosphere. If you are looking for an amazing training experience with a friendly group, I highly recommend you check out MMAA.