4 offensive players ought to line up on the line of scrimmage. 3 defensive gamers needs to be down linemen (in a three of four-issue stance). Just one linebacker may blitz on either side of the middle. Defensive linemen ought to line up no wider than shoulder to shoulder ("shading") https://leisurecityguide.wordpress.com/2024/08/29/the-thrills-and-benefits-of-indoor-football/