This article describes how magnesium absorption works, and explains: 1  Factors that reduce the bodyâs use of magnesium, whether through digestive intolerance or excess excretion by the kidneys.  What prevents magnesium absorption in the digestive tract.
Quick Answer. Professional and college football games last for 60 minutes, divided into two 30-minute halves and four 15-minute quarters. High school football games last for 48 minutes, divided into two 24-minute halves with four 12-minute quarters. There is one halftime break and shorter breaks after the first and third quarters of the game.
Save. The regulation time of a pro football games is 60 minutes. But many things can stop the game clock: dead balls, television commercials and timeouts, for example. And then there's the halftime break. All things considered, a game will actually usally last between three and three and a half hours.he regulation time of a pro football games is 60 minutes. But many things can stop the game clock: dead balls, television commercials and timeouts, for example. And then there's the halftime break.