Extra time does not extend a match; it changes the sport. Once the clock passes ninety, every sprint, pass and foul is priced against a different risk curve and a different kind of loss.
Coaches know the data tilts toward penalties, so strategy narrows. Teams that attacked in regulation often retreat into a low block, compressing space and trading xG for survival probabilities, while substitutions shift from chasing goals to preserving legs and calming heart rate variability under stress.
Players, too, quietly rewrite their own code. Glycogen reserves are near empty, lactate accumulation spikes, and the body shifts toward fat oxidation, which cannot fuel repeat maximal sprints, so tempo drops and pressing lines sink because one mistimed press can leave a defender stranded with nothing left to chase.
Psychology bends the pitch even more than physiology. With a shootout looming, midfielders stop forcing vertical passes, centre backs clear rather than build, and forwards accept isolation; the match becomes a negotiation with loss aversion, where staying alive for penalties feels safer than dying for an open‑play winner.
