A large-scale study of U.S. children and adolescents has found that participation in a team sport is associated with fewer mental health difficulties, but that kids who are exclusively involved in an individual sport—such as tennis or wrestling—may face greater mental health difficulties than kids who do no sports at all. Matt Hoffmann of California State University, U.S., and colleagues present these findings in the open-access journal PLOS ONE on June 1, 2022.