Adolescents who play team sports in grades 8 through 12 have less stress and better mental health as young adults, finds new research. "There is surprisingly little known about school sport, so we can only speculate as to the unique effects, but we suspect it might be due to school sport providing adolescents with opportunities to bond with other students, feel connected to their school, interact with their peers and coaches, thus, really providing a social and active environment," one investigator explained.