https://www.sportsmed.or.kr/board/view.html?num=925&start=50&code=sportsdoctor&key=&keyword=
https://www.khan.co.kr/sports/sports-general/article/202312072343015
https://edu.chosun.com/site/data/html_dir/2022/04/22/2022042200886.html
https://repo.kicce.re.kr/bitstream/2019.oak/5287/4/PB0091.pdf
야외활동 필요성