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.
That's because while the on-field action can be exciting, it's usually short-lived. In fact, according to a 2010 Wall Street Journal study of four football broadcasts, the ball was only in play for an average of 10 minutes and 43 seconds â approximately 4 seconds per play â even though an NFL telecast lasts about 3 hours.