Oops! I thought the science of this big tendon and its movements was settled! Specifically, I had high confidence that it does not move back-and-forth across the side of the knee (causing IT Band syndrome). My confidence was based on compelling evidence that it can’t move like that — an anatomical impossibility, or near enough. And so debunking “friction” in runner’s knee became one of the mythbusting pillars of my extensive writing on that topic.
It all seemed so clear! I really never expected any controversy on this topic.
And yet there is. Science seems determined to be perpetually unfinished!