WHO global report “Trends to Insufficient Physical Activity”
https://www.icsspe.org/content/trends-insufficient-physical-activity
https://www.icsspe.org/content/trends-insufficient-physical-activity
https://www.n-tv.de/wissen/Schon-wenig-Sport-haelt-Gehirn-fit-article20638050.html
https://www.aerzteblatt.de/nachrichten/97505/Was-in-Deutschland-wie-viel-Krebs-verursacht