Joachim Fischer was president of the DTU German Triathlon Union, is involved in his local Heinatverein and in the Sterkel Society.

https://www.yumpu.com/de/document/read/34874127/medical-triathlon-world-international-medical-triathlon-association

https://www.triathlondeutschland.de/aktuelles/03-2025/dr-joachim-fischer-zwei-verbaende-gingen-nicht

https://www.aerzteblatt.de/archiv/triathlon-fuer-aerzte-dreifach-in-form-b0b578b7-b920-4d5c-b654-34c5475d1699

https://www.sterkel-gesellschaft.org/de/index.php