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"Erik Marshall is a World Class Kickboxing Champion and teaches a World Class Kickboxing Fitness Program. If you are interested in learning from the 'Real Deal' then his Kickboxing Fitness Program is the one for you!" - Tony Spain, President, The Boxing Fitness Institute


"Erik Marshall is a no-nonsense martial artist. He was one of the few instructors that was enough of a visionary to look into kettlebell training before it started to become popular. I had the opportunity to work with him and his team on that. As a kick-boxing fitness instructor, Erik is 'the man.'" - Frank DiMeo, Author, "Strength for the Streets"


"The ability to get in shape and learn some self defense is what keeps me coming year after year." - Terri Zbiegiein


"Kickboxing Fitness has allowed me to focus better in other aspects of life outside of class. The ability to concentrate better at work when it is hectic, is one example. I have also learned to keep pushing myself even when I'm unsure that I can keep going, but in the end I'm able to finish." - Chad Warner


"Erik Marshall's teaching has changed my life in many ways I never thought possible. I have really enjoyed working out, to the point that I brag at work about doing Kickboxing Fintess. I have lost alot of weight and feel so much more confident in myself. Kickboxing Fitness makes me feel good. Thanks so much for making my life better. YOU GUYS ROCK" - Andrea Zimmer


"Kickboxing Fintess has changed my life by making me do a regular routine for the past 3 months. I have lost 8lbs and built lean muscle. I will keep going even after I reach my goals. This is the only workout I really like and will keep on doing. - Amber Hanson


"Erik's program has changed my life by relieving stress and now I am competing in the ring kickboxing." - Blanca Reyes (17 years old)


"Kickboxing Fitness has changed my life: losing weight, becoming physically fit, making new friends, helping me relieve stress, getting me interested in taking care of my body and mind; it keeps me occupied and I like the friendly, family-oriented environment." - Natasha Turginov


"Since working with Erik I have lost weight, toned my muscles and increased my cardiovascular fitness. Every class is different so its always fun and never boring. The instructors make you feel at ease and make exercising fun." - Dina Lundberg, mother of 3


"Always being the FAT KID I finally decided to do something about it, and joined Erik's Kickboxing Fitness program. It is a well-mixed class of cardio, weights and punching and kicking combinations. I have lost 40 lbs in 8 months. The weight loss has changed me in all aspects of life: work, social, and personal. My energy and self-esteem have gone through the roof. It is one of the best things that has every happened to me." - Justin Simms


"Since joining Erik's program I have been in the best shape of my life." - Brian McGuire

About The Kickboxing Fitness Institute

The Kickboxing Fitness Institute is the world's leading resource for Kickboxing Fitness Trainer programs. Health clubs from the USA and around the world recognize and respect our Certification.

We started with the observation that few fitness trainers use PROPER TECHNIQUE when incorporating kickboxing routines into their workouts. As a result, these trainers don't provide an optimal workout to their clients, and also risk causing injury. Also, a number of people want more than choreographed routines with annoying music. They are tired of inauthentic and unrealistic fitness programs, especially those using Hollywood actors, fitness models, and professional athletes instead of everyday people. As the fitness industry evolves, people want to learn REAL kickboxing technique, but without having to spar or fight.

Meanwhile, we realized that Erik Marshall's Kickboxing Fitness system is unique, gets great results and rave reviews, and is ready for a larger audience. So we created something different: a simple-to-follow, easy-to-learn fitness system, using the more or less normal people from Erik's gym as models.

The programs at the Institute are down to earth and practical. You will see real, regular people working out in a real workout facility. These are people who want to get in great shape like a boxer, but don't want to get in the ring and actually fight. They enjoy Kickboxing Fitness for cross training, self-confidence, strength, conditioning, and weight loss. They also have a great time. We hope you join us and get Certified today! You will be glad you did. Contact us at

Our Leadership Team:

Erik Marshall has accomplished a tremendous amount as a professional kickboxer and is also a superior instructor of children and adults. Erik has traveled and competed across the country and the world. He is a second degree black belt in Moodokwan, or full contact kickboxing, and is an eight-time amateur and three-time professional kickboxing champion (including two world titles along with five amateur world titles). He owns and operates Extreme Marshall Arts,a leading training center for martial arts and fitness.

He is a member of the International Sport Karate Association (ISKA), United States Kickboxing Association (USKBA), International Kickboxing Federation (IKF), World Kickboxing Organization (WKO), and Professional Kickboxing Federation (PKF).
Tony Spain is the creator of Absolute Boxing Fitness and The Boxing Fitness Institute in Sarasota, Florida. He is a Licensed Florida Boxing Trainer, Certified USA Amateur Boxing Coach, Certified Personal Trainer and Sports Nutritionist. His 25 years of Boxing experience and achievements include: former Golden Glove Champion, undefeated 4-time Toughman Champion and a former Professional title contender.

Frank DiMeo is a former U.S. Army Paratrooper,a Certified Personal Trainer through the National Strength & Conditioning Association (NSCA), and a Certified USAW Club Coach (Olympic Weightlifting). He is also a Level-1 Crossfit Training Instructor and has completed Level-1 Instructor Training with Kettlebell Concepts. See his innovative strength program, "" at the American Strength Training Institute.

Andrew Neitlich is a marketing consultant who has written a number of fitness marketing books. He received his MBA from Harvard Business School in 1991.