Safety

New research suggests that more intense training and inadequate diet are placing high school athletes at significant risk for developing stress fractures in the bones of the back, hip, leg and foot, with girls more likely to suffer such overuse injury and at an earlier age than boys.

Overuse running injuries such as patellofemoral pain syndrome (so-called "runner's knee"), and Achilles tendonitis may have more to do with weakened hip muscles than the sheer number of miles an athlete runs.