Our Team

We guarantee the best hardstyle kettlebell trainings in Switzerland:

All of our trainers are either StrongFirst Certified Instructors or black belt Kyokushin Masters with years of kettlebell practice.

We are all students of strength and karate. We teach and practice daily.

We are based in Wädenswil, Zürich. Check out our trainings page for our weekly training schedule.

Peter Bakonyi

I am a certified StrongFirst Elite (Kettlebell Level 2, Barbell, Bodyweight) instructor.

I teach strength training, primarily working with kettlebells since 2021. I give both group classes and personal trainings in Wädenswil, Switzerland. I am an active member of StrongFirst Switzerland. We are organising official StrongFirst Workshops regularly in Switzerland.

Completed certifications:

2024: SFB in Italy (Master Instructor: Jon Engum and Fabio Zonin)
2024: SFL in Italy (Master Instructor: Fabio Zonin)
2023: SFG II in Italy (Master Instructor: Fabio Zonin)
2021: SFG I in Hungary (Master Instructor: Peter Lakatos)

My sports background:

2020- Hardstyle Kettlebell training in Switzerland
2020- Kyokushin Karate training in Switzerland (currently 6th Kyu)
2016-2019 Strength training (barbell + bodyweight) in Malta
2013-2015 Hardstyle Kettlebell training in Hungary
2010-2014 Kyokushin Karate in Hungary
2005-2010 Acrobatic Rock & Roll in Hungary
before 2005: tried various sports (Taekwondo, football, handball, swimming)

My personal goal is to become an Elite Instructor (achieved end of 2024) and achieve the Sinister challenge.

I work full-time as a software engineer. I have a wife (also certified SFG) and two children. Being a parent and having a full-time job, I have experience with balancing training and personal goals.

Viktor Retter

Dojo founder and trainer
Rank: 3rd Dan Black Belt
Languages: German, English, Hungarian

I began Kyokushin Karate in 1993 at the age of eleven. During my karate training, I studied in several dojos under multiple masters. Early on, I also began teaching training sessions myself.

In 1999 and 2000, I was nominated as a member of the national team to participate in the European Championships. In 2000, I was honored by my hometown with the title “Sportsman of the Year.”

Since then, I have competed in various regional and national competitions and consistently achieved podium finishes. In addition to Kyokushin, I am proficient in other martial arts and combat sports, including Taekwondo, Goju Ryu, Kung Fu, Kickboxing, Jiu-Jitsu, and various other self-defense systems.

Certifications & Roles:

International referee for karate competitions (since 2018)
Certified Oxygen Advantage breathing instructor (since May 2025)
Certified StrongFirst SFG I kettlebell instructor (since Dec 2025)
Certified corporate mentor with a Swiss federal diploma (since Dec 2025)

Anna Maleczki

Experience:

StrongFirst SFG I (since 2021, recertified in 2024)
Hatha Yoga instructor (since 2013)
Dance background: Acrobatic Rock’n’Roll, Jazz Dance, Ballet
Aerial acrobatics: Pole, Aerial Hoop, Aerial Silk
Running since 2022, including half marathons and trail running