4 offensive players should line up on the line of scrimmage. 3 defensive players have to be down linemen (in a three of 4-issue stance). A person linebacker may blitz on either side of the middle. Defensive linemen ought to line up no broader than shoulder to shoulder ("shading") about https://indoor-football53173.blogcudinti.com/29880499/indicators-on-indoor-football-you-should-know