In which rounds were the most rotations of key players made, and how did this affect physical activity? Analysis of the eight best teams of the 2018 FIFA World Cup Russia - Chmura, P.; Kolodziejczyk, M.; Andrzejewski, M.; Chmura, J.; Rokita, A.; Drozdzowski, A.; Mackala, K.; Konefal, M. (BMC Sports Science, Medicine and Rehabilitation, 2024)