Ivanov, Danail, Grigor Gutev, and Iva Dimova. “The Extra-Time Artefact: Exposure Duration, Not Knockout Status, Accounts for Higher Accumulated Running Distance at the 2026 World Cup”. Journal of Human Sport and Exercise 22, no. 1 (October 8, 2026): 148–162. Accessed October 16, 2026. https://www.jhse.es/index.php/jhse/article/view/extra-time-artefact-tournament-match-running.