URL：https://www.cam.ac.uk/sites/www.cam.ac.uk/files/styles/content-885x432/public/news/research/news/childrenrunning.jpg?itok=lBO0-D1N
掲載元：https://www.cam.ac.uk/research/news/physical-activity-may-help-to-close-the-wealth-gap-in-school-attainment-by-improving-self-control
