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heat player welfare summer tournaments

Heat has become one of the defining medical stories of the 2026 World Cup, not because any single episode has been catastrophic, but because the cumulative physiological load on players across a monthlong tournament in high-summer venues is now being tracked, published and argued over in a way it was not a decade ago. Wet-bulb globe temperature readings, once a niche metric used mainly in military and endurance-sport contexts, are now cited in post-match press conferences.

• Cooling breaks are now written into match protocols when pitch-side heat indices cross agreed thresholds, typically inserted near the half-hour mark of each half.
• Kick-off times for the most heat-exposed venues have been shifted later into the evening compared with earlier tournament cycles, though not as consistently as medical advisors have requested.
• Hydration strategies have moved from generic advice to individualised sweat-rate testing for squads with the medical resources to run it.
• Substitution allowances have been expanded in some competitions specifically to manage heat load, separate from injury substitutions.