User blog comment:RadicalPatMan/A Question About The Loudest Yard/@comment-1203022-20180704021000

It's simple. Rita wants Lincoln spend more time playing outside than playing video games or reading comic books, which are unhealthy to a boy of his age. And since Lincoln wans't any help, she had to make more tough decition which in the end was making Lincoln play football.

About the other sisters, well since this was a Lincoln episode, it wasn't need to know what every other sister do. Or maybe every other Loud was making other type of activities which compensate the lack of exercise.