I have been doing BJJ for a few years and while it's not the perfect "ego filter" that some people claim, I have found it extremely effective in teaching coping skills. It's almost been too effective, in the sense that workplace behavior (when directed at me) that is 100% unacceptable often doesn't bother me enough to say anything.
In my experience, once you've spent a few hundred hours having physically larger people literally choke you at full intensity and practicing how to stay calm and methodically turn the tables, very little in the workplace impacts your calm.
In my experience, once you've spent a few hundred hours having physically larger people literally choke you at full intensity and practicing how to stay calm and methodically turn the tables, very little in the workplace impacts your calm.