h.harb wrote:Can you name two statements here that are inaccurate for potential knee injury from Vermont Ski Safety's list? It indicates Vermont Ski Safety doesn't understand ski technique.
Uphill ski unweighted.
Upper body generally facing downhill ski.
I think this is a situation where a picture is worth a thousand words. I've watched some of the video of that type of ACL injury and while the words (unweighted uphill ski & upper body facing downhill) were technically accurate, the people I saw that fit their model in no way shape or form were skiing those principles properly.
One guy was cockeyed on his downhill ski with his torso flopped over and his head below his a**, and his uphill ski seemed like a meter away with divergent tips. Not good PMTS weighting and counteracting, but his torso was facing downhill and his uphill ski flapping away. It also seems like people weren't skiing that way but were getting themselves into trouble with recovery moves.
I feel like they should have chosen better wording, maybe "inadvertent, uncontrolled, unweighted, or asymetric uphill ski" and "uncontrolled/inappropriate downhill facing torso". I don't know the best way to describe it, but I definitely think there is a difference between what they mean and good ski technique. What was it the supreme court said, "I may not be able to define it, but I know it when I see it".
Another thing, at least one brace company designs rigid braces to protect the ACL, which prevent rapid full extension because the mechanism of injury in other sports seems to involve full extension. Methinks ACL's are probably more complicated than we try to make them. I've read that 70% of ACL's are torn skiing through the mechanism VSS is trying to describe, but that means a full 30% occur in some other fashion.