Wrestling putzes (like in the cursed castles) trains up your agility, strength, toughness (I think) to different degrees.
So in other words, if you want your adventurer to move faster, the easiest way is to wrestle something for an entire day. You can actually watch your speed as it increases to judge when you are done. You also get kinesthetic and (i think) spatial sense as a bonus! I never put much into those stats because they are so easy to train.
Disease Resistance and Recuperation aren't worth investing in because quick travel, sleeping, and waiting still cure all non-permanent injuries, but you probably don't want to dump them either.
I am superstitious that Recuperation allows me to regenerate more when I quick travel. I have no proof of this, but since that is one of the few (potentially) useful stats I can't train...
Analytical Ability and Intuition are both technically used in Adventure Mode, for Knapper and Observer, but knapping is something you can train up easily and Observer is largely worthless because enemies never hide.
So this "knowledge aquisition" thing mentioned in the wiki... does it affect how fast your adventurer learns skills?
Memory decides how long after you see terrain do you remember what it's like.
Is that what that is for?! Oh! Well, then. I did not know that. How does that mechanic work?