An interception can last less than a second. A defender reads a pass, steps into its path and reaches the ball before its intended recipient. Yet that brief movement requires the brain to judge speed, distance and direction while the body accelerates, changes course and maintains balance.

Interceptions show how closely thought and movement are connected, and how mental and physical fatigue can disrupt that connection. As players tire, they must still decide whether to move and continually adjust their speed. A fraction too late, and both the player and their defence can be left exposed.

At the start of the 2026 World Cup semi-final week, France defender Dayot Upamecano led the tournament with 12 interceptions. His tally shows how often an elite defender must make these rapid judgments during a major tournament.

Interceptions also featured prominently in Cape Verde’s first World Cup campaign. The tournament debutants recorded 15 in their Group H opener as they held Euro 2024 winners Spain to a 0-0 draw. They averaged roughly 13 interceptions per match across four games, advancing from their group before losing 3-2 after extra time to defending champions Argentina in the round of 32.

Those figures do not prove that interceptions caused Cape Verde’s success. A high total can also show that a team spent long periods defending. But cutting out passes helped them disrupt opponents who had more of the ball and create chances to counterattack before those opponents could reorganise.

To understand how fatigue can affect this work, it helps to examine........

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