Overview
- Researchers presented results at the Alzheimer's Association International Conference on July 12, 2026, from 142 former elite soccer players who reported higher rates of depression and anxiety than 56 non-contact-sport controls.
- Structural MRI in a subset showed lower gray-matter volume in frontal, cingulate and thalamic regions that support memory, attention and emotional control.
- Standard objective cognitive tests found no significant group-level differences between former players and controls despite the symptom reports and imaging changes.
- Additional AAIC presentations tied greater heading exposure and longer careers to short-term rises in blood markers such as p-tau217 and S100B, and neuroradiologists judged about 2% of player scans to show clinically significant atrophy.
- The findings are associative and not peer-reviewed, so researchers are expanding the sample, adding advanced imaging and blood biomarkers, and launching multi-year follow-up to clarify whether repetitive head impacts cause later neurodegeneration and to inform player-welfare policy.