Is the Step Back a Good Exercise for Your Quadruceps?

The forces at the knee produced by this close kinectic chain activity of deceleration for change of direction, are better recreated by an open connectic chain exercise. The most functional ex cise would be the step back, right? Sure, but that puts a huge demand on the quadrucep, a muscle that is very likely weak. Just because an exercise looks like the task does not mean it recreates the demands of the task.