Personal Training with IMPACT.

Sergei is a professional fighter and trainer from Ukraine with over 24 years of experience in combat sports. His journey began in 2002 at the age of 14 with Muay Thai — a discipline that remains the foundation of his style and philosophy to this day.

His impressive amateur career includes over 300 fights on both national and international levels. Sergei became multiple-time World Champion in Thailand and won the Ukrainian National Championship seven times.

He made his professional debut in 2005. Across 30 professional fights, he secured major titles including European Champion, Intercontinental Champion, Ukrainian Champion, World Champion in Khmer Boxing (Cambodia), World Champion in Muay Thai, and World Champion in Kickboxing (WPK). For his outstanding achievements, he was awarded the title “Master of Sports of International Class.”

Today, Sergei continues to live and breathe the sport, training with the same discipline and passion that defined the beginning of his career. In addition to Muay Thai, he teaches kickboxing and classical boxing at a professional level. He also integrates functional training methods and CrossFit into his coaching approach to develop strength, endurance, and elite-level athleticism.

Disciplines: Muay Thai, Fitness Kickboxing, Boxing

Laszlo was born into a Hungarian family in Transylvania and began wrestling at just seven years old. At the age of 14, he moved to Budapest to train at the Olympic training center and pursue his career at the highest level. There, he became a Romanian national champion, a multi-time medalist in Hungary, and competed successfully at international tournaments in both Greco-Roman and freestyle wrestling.

For twelve years, Laszlo competed for the "Hornets" in the German Bundesliga—not only becoming an exceptional athlete, but also evolving into an outstanding coach. His protégés became German team champions and shone at international competitions. Since 2023, Laszlo has lived in Switzerland and enriched the coaching team at Impact Fight Club with his experience, discipline, and uncompromising pursuit of excellence. His wrestling is precise, his coaching profound, and his values clear: perseverance, humility, and respect.

Those who train with Laszlo learn from a true master—and grow beyond themselves, both physically and mentally.

Natassja is an enthusiastic and inspiring personal trainer and kickboxing coach. With her background in gymnastics and dance, she is full of energy and good poise. Throughout her whole life training has been of great importance and a large focus to feel well. Growing up in Sweden, she tried many different sports but found a love for dance while in high school. Dance was mostly street but also ballet and modern. As an adult she found the love for Martial Arts as one of the better and more fun forms for fitness training. She finds Martial Arts to be broad and extensive education and never ending learning for both body and mind. To be a woman, it feels important to be able to feel strong and more confident, and learn some self defense while having fun.

He then built his striking in Muay Thai and fought successfully in several Swiss cities. Brazilian Jiu-Jitsu followed, and he holds a purple belt in it today.

That covers what MMA is made of: punches and kicks standing up, control on the ground, and the transition in between. He teaches it the same way — technique, timing and tactics rather than raw power.

Nathan takes the sport seriously, himself less so. The tone in his classes is relaxed, the standard for technique is not. He competes himself and has never stopped learning.

Born in Campos dos Goytacazes, Rio de Janeiro, João began his Jiu Jitsu journey at just 14—and never looked back. Now a 2nd degree black belt and decorated international competitor, he has earned World and European titles, winning at elite tournaments across Brazil and Europe.

With over a decade of coaching experience in 12 countries, João brings a global, forward-thinking approach to every class. Raised in the iconic Nova União team—home to multiple UFC and Bellator champions—he developed a deep, well-rounded foundation in Jiu Jitsu, Muay Thai, boxing, wrestling, judo, and MMA.

More than just a technician, João lives and teaches the values of respect, humility, and discipline. Whether guiding beginners or advanced athletes, he inspires every student to unlock their full potential and become the strongest, most unstoppable version of themselves. As IMPACT’s Head Coach for MMA, João is also the main point of contact for our students—guiding them through their journey and standing beside them to support them at tournaments and competitions.