>>2573787 lb
D&D involves whatever the DM (Dungeon Master, game runner) decides it involves. Generally you play as a group of good adventurers fighting against some sinister plot, but people create characters with whatever personality they find interesting for the setting and story the DM creates. There's no documentation in the sense of psycological study of the players themselves, but your choices affect the way the game progresses – your characters may end up injured, dead, stronger, wealthier, missing out on loot, or changing the way the story develops. The changes to the characters in the game are documented, so people don't forget what happened last time or try to cheat to avoid the consequences of their actions.
>indicating physical exertion
Or just poor hygiene, which is a common stereotype of tabletop gamers.