History and Purpose
In the earliest days of American football, offenses were allowed to shift and assemble themselves as much as they wanted, much as defenses do. The famous Notre Dame Box relied heavily on these shifting motions. However, rule changes were eventually implemented that prevented offenses like the Notre Dame Box from ever occurring again. The motion rules seen today resulted from these rule changes. Currently, wholesale formation shifts can only occur before the offensive formation is set, and said formation must be in place for at least one second before a snap or motion can occur.
The purposes of motion are to allow the offense to change formations and, in leagues that allow forward motion, a chance to gain momentum on the defenders.
Read more about this topic: Motion (American Football)
Famous quotes containing the words history and/or purpose:
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—Gilbert Keith Chesterton (18741936)
“During the cattle drives, Texas cowboy music came into national significance. Its practical purpose is well knownit was used primarily to keep the herds quiet at night, for often a ballad sung loudly and continuously enough might prevent a stampede. However, the cowboy also sang because he liked to sing.... In this music of the range and trail is the grayness of the prairies, the mournful minor note of a Texas norther, and a rhythm that fits the gait of the cowboys pony.”
—Administration in the State of Texa, U.S. public relief program (1935-1943)