World Strongman Federation

The "World Strongman" International Union of associations and clubs (old name World Strongman Federation - "WSF") ("WSM") is a worldwide organization within strength athletics, founded by Vlad Redkin, a prominent figure in the history of the International Federation of Strength Athletes and World Strongman Cup Federation. The WSF has organised a number of grand prix events and national championships featuring some of the world's leading strength athletes including 5 time World's Strongest Man winner Mariusz Pudzianowski, Brian Shaw, Mikhail Koklyaev, Krzysztof Radzikowski, Tarmo Mitt, Kevin Nee, Stefan Solvi Petursson, Laurence Shahlaei and Mark Felix.

Source: Wikipedia — World Strongman Federation (CC BY-SA 4.0)