I came across this great article "Beyond Ballgames: The Impact of Sport for Girls" from the Women in the World Foundation. The article focuses on the benefits and significant impact that having non-profit groups dedicated to sport and the development of young girls.
"Sport and physical activity have their own intrinsic benefits for girls, but these groups are using sport for super social impact."
"A growing body of research has linked athletic participation with any number of benefits: better grades, higher self-esteem, life lessons of teamwork, leadership and discipline. "
Check out the article here.