Brett Jones, Master RKCI had a chat with one of my Krav Maga (Israeli self defense) instructor, who in a typical intellectual world may look like an idiot (in a fun way of course). One talk was about one of his apprentice trainer. He told me that her thorasic spine posture is a little bit stooped which in the end compromises her punching power. I had the exact same observation regarding her. We both had the same opinion. However, my knowledge is based on spending few thousand dollars attending CK-FMS, his observation is based on day in day out being a professional as a Krav Maga instructor.
To tell the truth, this guy doesn't look smart (forgetting which locker he used, couldn't remember the name of position he played for his American football team) in a typical standard. However I consider him very instinctively smart and is pretty much ahead of me in many terms.
What is intellectually smart? or what is exactly smart? This questions me quite frequently because I've seen lots of people supposely acting smart dispatching stresses and causes that end up conflicting with other people.
If we (anyone) end up laughing after overcoming conflicts of our own, then probably we are on the right track.
Fitness probably means muscles, endurances etc. Physical culture covers all that plus brain as well. After all, our brain rides on the physical structure of muscles, skelton combined with functionality of power, endurance, flexibility, joint mobility, stability, spine alignment....
The smartest one may be the one who knows about spine.