This is an excellent question, and as someone who tore her ACL playing soccer as a teenager and has had problems with her knee ever since, knee injury prevention is a topic that is very important to me.

CNN: How do I protect my daughters' knees from sports injuries?

Ideas floated for study include using advanced scanning techniques and genetics to fuel knowledge about who is most at risk for head injury, finding ways to regrow knee ligaments in a lab, identifying injury prevention strategies such as new drugs or new helmets, and addressing ethical issues surrounding player injuries.

CNN: STORY HIGHLIGHTS