South Korean professional football is facing a growing player-safety crisis as extreme summer heat leaves hundreds of players reporting dizziness, dehydration and other heat-related symptoms — including temporary loss of consciousness.
An emergency survey of 536 players from South Korea’s K League and WK League found that 86.2% said extreme heat placed a significant physical burden on them. Even more alarming, 64.7% reported dizziness, 56.6% reported severe dehydration and 13% — or 70 players — said they had experienced temporary lapses in consciousness while playing in extreme heat.
The findings have prompted the Korea Pro-Footballers Association (KPFA) to demand mandatory and enforceable heat-safety measures from the Korea Football Association, K League and WK League.
The players’ message is increasingly difficult to ignore: the issue is no longer simply about discomfort during hot matches — it is about whether existing safeguards are strong enough to protect athletes from potentially dangerous heat exposure.
70 Players Reported Temporary Loss of Consciousness
The KPFA survey provides one of the clearest snapshots yet of how extreme heat is affecting professional footballers in South Korea.
Among the 536 players surveyed:
- 86.2% said heatwaves created a significant physical burden.
- 64.7% experienced dizziness.
- 56.6% reported severe dehydration.
- 32.2% experienced headaches.
- 12.2% reported nausea.
- 13% — 70 players — reported temporary loss of consciousness.
KPFA president and former South Korea international Lee Keun-ho described the findings as a major warning sign, arguing that the number of affected players could be even higher because not everyone participated in the survey.
The survey comes as South Korea experiences an exceptionally punishing summer. Pitch temperatures have climbed above 40°C, while the southeastern city of Yangsan recorded 42.5°C on August 2, according to Associated Press reporting.
Players Say Current Cooling Breaks Are Not Enough
The controversy is also putting the spotlight on football’s existing cooling-break system.
FIFPRO says its heat guidelines recommend cooling breaks when Wet Bulb Globe Temperature (WBGT) exceeds 26°C and delaying or postponing matches when WBGT rises above 28°C. WBGT is designed to measure the combined effect of heat, humidity and solar exposure on the human body.
Almost half of the surveyed players — 48.4% — expressed dissatisfaction with the current cooling-break system, according to FIFPRO. The association said players typically receive a break of only slightly more than three minutes when the relevant threshold is reached.
The demand for change was overwhelming: 89.3% of surveyed players said existing match-operation standards should be overhauled.
Changing kick-off times was the most popular proposal, backed by 52.6% of respondents. Another 37.5% supported postponing or cancelling matches when heat advisories are issued.
The Bigger Fight: Change the K League Calendar
The players’ association is now pushing a more radical solution — changing when the K League season is played.
South Korea currently operates a spring-to-autumn football calendar, meaning players compete through July and August, traditionally among the hottest months of the year. The 2026 K League season began on February 28 and is scheduled to conclude on December 6.
KPFA wants South Korea to move toward an autumn-to-spring calendar, with a winter break during the coldest period.
The proposal would bring the K League closer to the scheduling model used by many European leagues and the Asian Football Confederation’s Champions League Elite. Japan’s J.League has also moved to a summer-to-spring calendar for the 2026-27 season.
But the proposal comes with its own complications.
South Korea’s winter can bring subzero temperatures and heavy snowfall, creating concerns over pitch conditions, stadium infrastructure and attendance. KPFA president Lee Keun-ho has suggested using a winter break while investing in stadium heating systems and hybrid playing surfaces.
Women’s Football Faces an Extra Heat Risk
The problem may be even more pronounced in women’s and youth football.
KPFA women’s president Ji So-yun, who also plays for Suwon FC and is South Korea’s all-time leading women’s international goalscorer, highlighted infrastructure problems affecting female players.
Some women’s and youth matches can be scheduled during the hottest part of the afternoon, while certain stadiums lack adequate air-conditioned changing facilities. Artificial pitches can also absorb and radiate additional heat.
That means the debate is not simply about moving professional men’s matches to cooler hours. It raises broader questions about whether football facilities across South Korea are equipped for a hotter climate.
South Korea’s Heat Problem Is Becoming a Football Problem
The football debate is unfolding against a broader extreme-weather crisis.
The Korean baseball league recently suspended games for almost a week because of the heat, while K League officials have already adjusted some kick-off times. Korea JoongAng Daily reported that K League matches were moved from 7:30 p.m. to 8 p.m. during the recent heatwave.
The pressure is therefore moving beyond a single league or a handful of matches.
As temperatures rise, football authorities are increasingly being forced to confront a difficult question: Can traditional sporting calendars and safety protocols keep pace with a rapidly changing climate?
For the players who took part in the KPFA survey, the answer appears increasingly clear.
They want heat protocols that are mandatory rather than discretionary, clearer rules for postponing or cancelling matches, safer kick-off times and a serious examination of the entire football calendar.
And with 70 professional players already reporting temporary loss of consciousness during extreme heat, the debate has moved far beyond comfort.
It is now a question of player safety — and how much heat football can realistically withstand.
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