The aTB team
We are here for you
Dr. h.c. Kurt Heinz Reitz
Executive Director
Hello, I'm Kurt and 20 years ago I took over this fitness center - which had already existed for over 30 years - with the aim of continuing the health-oriented studio. From then on it was called Fitnesscenter aTB and since January 1st, 2020 it has been converted into a GmbH.
After completing my business studies in Mainz, with periods of study in Dijon and London, I worked in Frankfurt and Munich and ended up in Berlin in 1990. In addition to the focus on tourism - which I teach at various universities in Germany and abroad - I also contributed to the studio as a fitness trainer.
From 2007 to 2013 I also helped set up a tourism faculty at the university in Batumi / Georgia. I have been back at aTB in Berlin since 2013, although I have also spent various voluntary periods abroad – since then in Uzbekistan, Mexico, Kyrgyzstan, Georgia, Laos and many more.
My credo is Carpe Diem – Don’t worry, be happy.
Frank
Owner
Hello dear friends of aTB. My name is Frank Friedrichs and I have been the new owner and manager of aTB since mid-2024. By purchasing the Fitnesscenter aTB GmbH, I have managed to prevent the already certain closure of this unique gym, which has existed in the Bergmann district for 20 years.
As a native Berliner, I have been working in the sports and training sector since 1993. During this time, as a co-founder of Hertha BSC's youth academy and as a long-time youth coach and coordinator, I accompanied the club's most historically successful phase.
After the successful conversion into a youth performance center certified by the German Football League, I set up my own football school. The players I trained were able to take part in world and European championships as well as other international competitions such as the UEFA Champions League. Over 100 youth players from my football school have made the leap into "big football" in the past 20 years.
My big goal is to preserve the charm and diversity of the aTB and at the same time to develop high-quality training concepts for members, visitors and guests in the future.
"If you want to change the world, change yourself - then the world will change towards you too." (Gandhi)
Ramin
Trainer, Martial Arts Coach
Hello, my name is Ramin. I have been living in Berlin since 2015 and come from Kabul. I have been training Taekwondo for 18 years and have already taken part in various national and international competitions and have also received various awards, such as the "Third Dan" in Taekwondo.
I have already successfully completed my training as a sports and fitness clerk. At the moment I enjoy working here at the aTB fitness center.
I already have certificates as:
- Sports and fitness salesman (IHK Berlin)
- B license prevention / rehabilitation (BSB)
- Instructor C license
- Instructor B license (posture and movement system)
- Instructor B license (health training cardiovascular system) from the Berlin State Sports Association
- Fitness trainer B license (BSA Academy)
My goal is to work with people who are interested in sports and fitness and to help them improve their personal performance. I already have experience as a trainer in Taekwondo and self-defense. I enjoy motivating people and showing them how to do sports.
Nick
Sports and Fitness Merchant
Hello, I'm Nick and I'm 21 years old. I've spent the last 2 1/2 years at aTB training as a sports and fitness salesman, which I recently completed.
I'll be supporting the team for a while. From October 2025 I'll start a course of study where I can use the commercial understanding I've acquired as a basis.
Regardless of that, I'll occasionally drop by aTB!
Apart from that, I like playing ball sports. When I was a child, I played soccer for 8 years, then moved to a competitive volleyball club for two years and currently still enjoy playing beach volleyball.
Marco
FIT-BOXING & KICK-BOXING INSTRUCTOR
Hello, I'm Nick and I'm 23 years old. I've spent the last 2 1/2 years at aTB training as a sports and fitness clerk, which I recently completed.
I'll be supporting the team for a while. From October 2025 I'll start a course of study where I can use the commercial understanding I've acquired as a basis.Hello, I'm Marco and I've been working as a martial arts trainer at aTB for over 18 years with fun and passion. I offer martial fitness and kickboxing.
My sporting qualifications include 3rd Dan in kickboxing and 1st Dan in karate. I have the
- B-license Trainer DOSB
- Coach and
- Referee C-license from WAKO.
I am a licensed Hyper Pro Training / Fight Club Instructor.
My sporting successes include 8 state championship titles in kickboxing and karate. I am the current and 4-time German champion in kickboxing and a member of the national team and national trainer in the area of forms.
Regardless of this, I will occasionally drop by aTB!
Apart from that, I like playing ball sports. As a child, I played soccer for 8 years, then moved to a competitive volleyball club for two years and currently still enjoy playing beach volleyball.
Stéphane
Masseur, Trainer for Yoga and Qi Gong
Hello, my name is Stéphane Kamesh Seckin. After my martial arts career as a three-time European champion in the Vietnamese martial art Qwan Ki Do, I developed an ever deeper relationship with Asian healing artists in the following years. My areas of expertise include
- TCM,
- Qi Gong and
- Thai yoga massage.
I also undertook several study trips to China, Thailand, Sri Lanka and India. This fascinating path of martial arts and healing work began in 1988.
Marcel
Instructor, Trainer
Hey, I'm Marcel. In my eventful life, on paths that aren't always straight, I've learned one thing to take to heart: it's important to find a balance between work and rest phases.
Whether in the traveling circus, running my own fashion label, in the tailor's workshop, in the theater, in the catering industry or when setting up a stage. It was always important for me not to lose communication with my body.
Get moving - Be in motion
Be moved - Move something
As a course leader, I'm now looking forward to sharing these experiences with you. I have successfully completed:
- B license and A license
- Nutritionist license
- Personal trainer license
- Back school teacher license
- Group trainer for health courses
- Health trainer for prevention and sports rehabilitation
- Coach for stress management and relaxation
Listen to your body. Through your passion and courage you change your reality on all levels. This is the focus of my individual or group-oriented work.
Shugen
Trainer for Pencak Silat, Fitness and Tai Chi
If you can't fight with a broom and dustpan, you should keep your hands off swords and staffs.
In the atB fitness center, I offer the Pencak Silat course, a traditional martial art from Indonesia and Malaysia. I myself have a trainer's license (comparable to the first Dan).
In my youth, I spent 4 years on the streets and can say that only martial arts and sport saved me from many things and ultimately gave me the strength to fight my way out of that situation. In the meantime, I have not only successfully completed my training as a sports and fitness clerk, but am also studying social work alongside my work as a trainer so that I can later combine both paths.
The atB fitness center has a very special role in my life and heart, as it was the place where my self-employment and my path to training and studies began. I like the atmosphere of the studio, which also attracts certain people, be it members or the team. For me it is a piece of home.
In addition to over 10 years of experience as a trainer, I also have a fitness trainer B license and a back fitness instructor license.
You are very welcome here, just as you are and I look forward to seeing you!
Tomi
Trainee for Service Management
Hi, I'm Tomi and I'm 18 years old. Over the next four years I will be completing my training and my A-license as a trainer at the aTB fitness center.
I was motivated to do sports as a child. I started learning to swim at the age of 6 and received my gold swimming badge. I also started with the Boy Scouts very early on, where I expanded my knowledge of nature and camping. After that I was in the Aikido club for a while to "try out" the martial arts.
My goal is to expand my language, sports and nutrition knowledge at the end of the training. After my training I want to study to become a nutrition expert to help people lead a healthier life.
Alex
Employee
Hello, I'm Alex and I'm 18 years old. I'm originally from the USA. In the next few years I'll be studying in Berlin and working at aTB to eventually get a personal training license.
Doing sports has become a new passion for me and it's not unlikely that you'll see me training in the gym from time to time. You're welcome to come to me or ask questions at any time, I'm happy to help.
My goal is to help people improve their fitness and improve myself in the field.
Jonatan
Employee
Hello, my name is Jonatan and I am 22 years old. I have been playing competitive soccer for over 16 years, so training, nutrition and health have long been part of my everyday life. My goal is to become a professional soccer player and at the same time I want to deepen my knowledge and experience in the field of fitness, athletics and health sports.
I have already gained some experience as a trainer and am motivated to accompany and support people on their way to greater well-being. I have the
- Fitness Trainer A license
- Functional Trainer license
- Fitness Trainer B license
I see the aTB fitness center as the ideal opportunity to promote my professional development with my passion for sport and health.
Christian
Employee
Hello, my name is Christian. I was born in West Berlin and lived here in Kreuzberg 61 until my early 30s.
I have been suffering from arthritis for several years, do physical therapy and in the process have found this peaceful oasis aTB. Now I am stranded here and would like to try to maintain the spirit of this special place.
If you want to know more about me, just talk to me.
"Health is not everything, but without health everything is nothing."
Fred
TRAINER, PERSONAL TRAINER, Boot Camp Instructor
Hello, I'm Fred. I have a master's degree in sports science with a focus on competitive sports. In recent years I have been able to gain extensive experience as an athletic trainer and personal trainer with various groups of people. For me there is a close connection between a sporty, vital appearance and psychological well-being.
My qualifications include:
- Master of Arts in Sports Science
- Fitness Trainer A License
- Athletics Trainer A License
- Certification as a Trainer for Prevention and Therapy
- Back School Teacher
- Cardio Trainer A License
- Certificates for TRX Suspension Training and the Functional Movement Screen
My training programs are individually tailored to the needs of my clients, regardless of whether they are looking for muscle building, weight loss or sport-specific athletic training. My approach is based on sports science, evidence-based methods. My goal is to inspire people to do sports in the long term and to improve their quality of life through a healthy body. Let's work together to achieve your fitness goals and improve your well-being.