In a sport, what's the timeline from the time a injury is identified as a problem? Let's say it's in ice hockey. When I was younger and playing ice hockey, we didn't have the stop sign on the back of the jerseys saying not to hit from behind. At the time, it was obviously an offence, but it wasn't as much of an issue. But now all these young kids I know in our area have that little stop sign on their backs, which probably helps them in many ways.
How long does it take before you can identify a problem and you get it to the coaching level, to the organization level, and it gets further?