Youth Sports Facts: Participation Rates - Project Play

Project Play collects and distributes national participation rates for kids in youth sports each year.

Effects of Early Sport Participation on Self-esteem and Happiness – The Sport Journal

7 Charts that Show Why We Need to Fix Youth Sports - The Aspen Institute

Youth Sports Facts: Challenges - Project Play

大谷翔平、日本の全小学校にグラブ6万個寄付 「野球しようぜ！」特別メッセも公開

Participation Trends - Project Play

Is the NFL Super Bowl really the sixth most watched sport event worldwide? I'd have thought it would be higher. - Quora

Youth Sports Facts: Participation Rates - Project Play

Frontiers Trends in sports participation in adolescents: Data from a large-scale sample in the US adolescents

Youth Sports Facts: Why Youth Sports Matter - Project Play