England's squad will all wear Whoop fitness trackers during the 2026 World Cup to monitor player recovery, manage training load, and cope with North American travel and heat. The decision was driven by head coach Tuchel, with the Netherlands and Portugal national teams making the same choice. Whoop's screenless design allows wear during matches, tracking key metrics like heart rate variability (HRV), sleep quality, and recovery scores in real time. Reports say England views recovery as a "tactical weapon," with Whoop data directly guiding player rotation and training intensity decisions.