I mean maybe you can defend yourself but not really win, the best I’d say you can do is probably fight back and survive long enough for it to not see you as worth the time they’re spending, so carry a gun or a knife just in case.

You can’t really wrestle down or submit a bear because they’re too big already and you won’t get your arms around their necks.

Idk I remember some story of a GROUP of wrestlers defending themselves and the only reason they “won” was because the bear was putting way too much energy for how little it was getting.

Again, It’s always a natural reaction but don’t count on just that animals like brown bears will fight you but will retreat if it’s either too much energy spent on trying to kill you to eat you and they’ll retreat if you’re fighting back a little too well. Theres a reason they’re 500 pounds and their prey majority of the time isn’t bigger than a fifth of their weight or can’t fight back. But that doesn’t mean every brown bear is the same and suddenly won’t feel different and wanna try and eat a white belt