
Why stability in the feet
is essential...
With 26 bones each, along with numerous joints and ligaments, the feet are among the most complex parts of the human body. They absorb impact, support the knees, and provide stability. Yet in everyday life, natural movement patterns are often restricted — leading them to “rust up.”
This imbalance can cause physical issues throughout the entire body.
A healthy foot boosts performance in both recreational and competitive sports while also reducing the risk of injury. To enable healthy feet and physical stability for people of all ages, we developed BlackBoard.
Discover BlackBoard for your feet!

BlackBoard Basic
Worldwide shipping | Shipping time: 8-12 Days
With the BlackBoard Basic Set, you strengthen the key — and often neglected — areas of your feet, helping you build strong, pain-free feet. Get your hands on the 4-piece Basic Set from BlackBoard, trusted daily not only in thousands of households but also throughout professional sports in Germany.

BlackBoard Professional
Worldwide shipping | Shipping time: 8-12 Days
Professional athletes around the world use BlackBoard daily.








Exclusive for customers: The
BlackBoard Trainingcenter
In our Training Center, you’ll find guides and videos from instructors and experts to help you achieve maximum training results.





Lars Grandjot
Physiotherapist
After completing my training as a physiotherapist in 2009 and moving to Cologne, I developed the BlackBoard together with my business partner Gregor to strengthen the feet. We created the BlackBoard training to promote healthy, high-performing feet. Today, I live on Gran Canaria, work as a physiotherapist, and teach functional anatomy.
Lars Grandjot
Physiotherapist
After completing my training as a physiotherapist in 2009 and gaining my first experience in clinical practice, my professional journey took me to Cologne in the Rhineland. There, I met my friend and now business partner Gregor. We worked together at a sports rehabilitation center, helping patients and athletes recover every day. It was a shared process of development and discovery that led to the idea of the BlackBoard. “We needed a training device that would allow us to specifically target the feet—restoring their vitality and strength.” That’s how the idea for the BlackBoard was born. Over the years, that idea became reality, evolving into a specialized training concept for healthy, high-performing feet: the BlackBoard Training. In 2016, I moved with my family to Gran Canaria, Spain, where I still live and work today as a physiotherapist and rehab trainer. I also teach advanced courses in functional anatomy—because learning never stops, and growth is a constant journey.
Gregor Stumpf
Graduate Sports Scientist
After completing my studies in sports rehabilitation in 2006, I worked with professional athletes and also taught at the German Sport University. In 2015, I joined Bayer 04 Leverkusen, where I was able to deepen my expertise in a top-level facility. This experience ultimately led me to develop the BlackBoard together with Lars — a tool now used worldwide for recovery after injuries and to enhance athletic performance.
Gregor Stumpf
Graduate Sports Scientist
In 2006, after completing my degree in rehabilitation-focused sports science, I spent nine years working in a clinic treating professional athletes across various disciplines. During this time, I also became a member of the German Olympic Sports Confederation and taught injury prevention and rehabilitation at the German Sport University Cologne. In 2015, my career took a new direction when I began working as a rehabilitation coach at Bayer 04 Leverkusen. This opportunity allowed me to work in one of the most advanced sports rehabilitation facilities, complete with a biomechanical lab. That same year marked the beginning of the BlackBoard journey, inspired by our combined experience as coach and therapist. Lars and I both felt that a training tool like this was missing—so we set out to create it. Today, we’re incredibly proud that trainers, athletes, and countless individuals around the world use BlackBoard to recover from injuries, grow stronger, and advance in their careers or personal athletic pursuits.
Armin Harrasser
Sports Scientist (M.Sc.)
For the past 7 years, I’ve been teaching therapy methods around the world, working alongside foot surgeon Dr. Kai Olms, and treating Olympic athletes such as Galen Rupp and Dimitrij Ovtcharov. Next up: teaching in Japan and South Korea.
Armin Harrasser
Sports Scientist (M.Sc.)
Over the past 7 years, alongside my work at my own facility, I’ve had the unique opportunity to travel the world, teaching therapy concepts such as Spiraldynamics©, BlackBoard Training, and Human Tecar. I’ve held courses and provided treatments across the globe — including in the United States, Saudi Arabia, and throughout Europe. I’ve built a close professional relationship and friendship with world-renowned foot surgeon Dr. Kai Olms, and have had the honor of being part of his team on various international projects. In recent years, I’ve treated elite athletes, including Olympic medalists Galen Rupp (USA) and Dimitrij Ovtcharov (GER). My upcoming projects include teaching courses in Japan and South Korea.BlackBoard Online Consultation (One-on-One Session)
Experience a personalized coaching session with Armin Harasser, your dedicated trainer and advisor. In the BlackBoard Online Consultation, you’ll benefit from a one-on-one session tailored specifically to your needs and goals. Whether you’re looking to enhance your skills, overcome specific challenges, or gain new perspectives, Armin offers expert support and valuable insights to help you move forward.
We now have over 20,000 satisfied customers.
Here you’ll find a few reviews of our BlackBoard products.

Dr. Oliver Ludwig, human biologist and author of “Gait Analysis in Practice”
Practicing with the Blackboard offers a unique way to train the complex range of foot movements. A variety of well-considered and easy-to-implement exercise programs help. This provides the athlete and patient with a stable starting point for almost any athletic movement.
Dr. Mellany Galla, foot specialist from Hanover, past president of the Society for Foot and Ankle Surgery (GFFC e. V.)
A training device that takes into account the complex movement patterns of the foot and ankle and is ideal for training foot and leg muscles – both for prevention and rehabilitation. The structured manual and videos simplify use for the patient.
Dr. med. Guido Laps, team doctor TSV Bayer Dormagen Handball
Why complicate things when you can do it simply? Effective training for the lower ankle.
Frank Offermann, physiotherapist, osteopath “German Basketball Association”
The Blackboard can be easily integrated into the daily routine of a sports or physical therapist. At the same time, experienced manual therapists can use the Blackboard to perform functional foot mobilization. It’s an ideal therapy aid that no therapy practice or sports support organization should be without.