[glbski]

If it's done right, it's quicker for a player to run to from the defensive restrainnig line to the midfield line, where a defender (usually a long pole) can then step off inot the box, and as soon as he does, a new middie can then run in from the box. It will cut 10 to 20 yards off the exchange this way. The player that just cam to the midfield line can then jog/run to the sideline and when he enters the box, the long pole can step back onto the field.