When Katie Landgrebe broke her femur in a tournament soccer game in seventh grade, she came to the Sports Medicine Biodynamics Center at Cincinnati Children's for physical therapy. Researchers at Cincinnati Children's were interested in studying young athletes like Katie. They wanted to know why female athletes were up to six times more likely than boys to tear their ACL, the anterior cruciate ligament that runs through the center of the knee and is one of the primary stabilizers of the joint. Jensen Brent, a biomechanist at Cincinnati Children's and director of the training and injury prevention programs, watched Katie's form and challenged her to work harder. He showed her ways to strengthen her muscles and keep from getting hurt. She continued training while she played on the varsity soccer team as a freshman at Madeira High School. Her coach took notice and got the whole team involved. The training helped lead the team to a winning season. And it helped the sports medicine program at Cincinnati Children's become known not just for helping injured athletes — but also for preventing injuries altogether.