17 hours Ago
What the Study Found
More than 300 male amateur football players took part in the research during competitive matches. Blood samples were taken before and after play, with scientists measuring specific biomarkers — the same biological indicators doctors use when assessing brain injury and dementia. The results showed a clear pattern: the more frequent and forceful the headers, the stronger the effect on these markers.
The good news, if it can be called that, is that blood marker levels returned to normal within 24 to 48 hours. But lead researcher Jort Vijverberg was careful not to read too much into that. Falling biomarker levels, he noted, do not necessarily mean any potential damage has fully healed. "Repeated exposure to these acute effects could potentially lead to long-term damage over time," Vijverberg said. "It is not yet clear whether this plays a role in dementia, but the results are relevant for future policy on heading in football."
Neuroscientist Marsh Königs pointed out that while the Health Council had previously flagged higher dementia risks among professional footballers, the direct connection between heading and measurable brain markers had not been established — particularly among amateurs. This study begins to fill that gap.
What Happens Next
The KNVB welcomed the findings as valuable scientific insights and acknowledged the need to reduce heading load in the game. The association also emphasized the importance of adequate rest and recovery time for players.
Still, the KNVB stopped short of banning heading for children under 12, despite an earlier recommendation from the Dutch Sports Council. At that age, headers are rare anyway, and the federation's position is that young players should learn proper heading technique rather than avoid it entirely.
Looking ahead, Amsterdam UMC and the KNVB plan to expand their research, with women's football set to be a key focus in future studies.
