A study comparing playgrounds in London, where risky play spaces are popular, to those in San Francisco, Los Angeles, and New York, found that children using London's playgrounds were up to 18% more physically active.
有一項研究將廣受歡迎的倫敦冒險遊樂場與舊金山、洛杉磯和紐約的遊樂場進行比較,發現倫敦遊樂場的孩子,其體力活動力高出了 18%。