We're still wired to assess potential danger and the strength/weaknesses of our surroundings, especially people and animals. The first thing that the brain thi

We're still wired to assess potential danger and the strength/weaknesses of our surroundings, especially people and animals. The first thing that the brain thinks when seeing a bodybuilder is that it would not win in a fight, nor would it be able to run (no, you can't outrun them - they may have no endurance, but in the first 5 minutes they can outrun and outmatch almost anyone), so instinctively, it's afraid and more careful/respectful in order not to anger that person. The same goes for martial art experts of course, but it may not be immediately obvious that the person is stronger/faster. If you are the MA expert, you'll be confident that you can take on anyone in the room, which makes you calmer and increases your outwards confidence, as well. It's all really interesting, indeed...