Is There a Minimum Requirement for Quad Function During Running?

Athletes who have a wek quad tend to run with less knee excursion. Return to play requires max' effort intensity, which likely requires max's physical capacity. The quad demand during a foot strike while running is simply managing relatively al ground reaction force that is a factor of body weight. To me, it makes sense to consider tork, production of the quad, as a ratio to the athletes body weight.