Zanshin, as I understand it, is a state of relaxed but heightened awareness (lit. "remaining mind/heart"). It’s about staying mentally present and alert, both during and after an action. In traditional martial arts like kendo or kyudo, it’s about being aware of your surroundings and ready to respond, even after dealing with the immediate threat.
In self-defense and mental resilience, I think zanshin is relevant because it’s about avoiding complacency. Self-defense isn’t just about handling one attack, like you posted in another thread. It’s about staying aware of other threats, whether that’s another attacker, an escalation, or finding a safe exit.
I don’t think there’s a direct parallel in MMA that I’m aware of. MMA seems more focused on immediate action and overwhelming your opponent, rather than that broader sense of awareness and readiness for what’s next. That’s why I thought zanshin might be a useful mindset to bring up in this context.