The Magic Circle

Game rules, therefore, create a kind of artificial reality in which those rules exclude other equally valid or defensible rules. In other words, there is no place for a chess piece in backgammon, baseball isn’t played with a hockey puck, a player can’t die in Candy Land, and there are no sugarplum fairies (to date) in World of Warcraft. The way each game’s rules and equipment combine to define the unique experience of playing that particular game is referred to by theorists as the magic...

 An Algorithm for Predicting Longevity

For the test, participants exercised on a treadmill at increasing speed and incline. While they were exercising, the researches measured peak heart rate (%MPHR) and their ability to withstand physical exertion. On that latter point, they measured metabolic equivalents, or METs, which gauges how much energy the body expends during exercise. The more intense the exercise, the higher the METs (e.g. slow walking = ~2 METs, whereas running = ~8 METs). [...] FIT Treadmill Score = %MPHR 12(M...