Repetitive Subconcussive Impacts in Sport: From Advanced Neuroimaging to Prevention
Growing awareness of the neurological consequences of contact sports has led to the emergence of a multidisciplinary field integrating neuroscience, sports medicine, and advanced neuroimaging. Particular attention has been directed toward repetitive subconcussive impacts—head impacts that do not produce the clinical symptoms of concussion but may induce cumulative biological changes within the central nervous system.
Association football (soccer) has become a major focus of this research because repetitive heading is an integral component of both training and competition. Increasing evidence suggests that even in the absence of clinically diagnosed concussion, repeated heading may be associated with subtle alterations in white matter microstructure and functional brain connectivity.
Advanced Neuroimaging of Athletes
Current research employs state-of-the-art magnetic resonance imaging techniques, including:
- Diffusion Tensor Imaging (DTI)
- Three-dimensional white matter tractography
- Structural and functional connectome analysis
- Functional magnetic resonance imaging (fMRI)
- Magnetic resonance spectroscopy (MRS)
- Advanced volumetric analysis of cortical and subcortical brain structures
These techniques enable the detection of brain alterations that remain invisible on conventional MRI and represent promising biomarkers of early neurological injury associated with repetitive sports-related head impacts.
Selected Publications
Brain MRI Findings Associated with Soccer Heading: A Systematic Review and Meta-analysis
Tykocki T.
Neuroradiology. 2026.
DOI: 10.1007/s00234-026-04040-6
This study represents the first quantitative meta-analysis evaluating MRI findings associated with repetitive soccer heading. The analysis incorporated diffusion MRI, magnetic resonance spectroscopy, and morphometric imaging studies. Results demonstrated a significant association between heading exposure and microstructural white matter alterations detected by diffusion tensor imaging, whereas conventional volumetric MRI showed substantially lower sensitivity. The findings support diffusion MRI as the most promising imaging biomarker for detecting subclinical brain changes related to repetitive subconcussive impacts.
Risk of Cognitive Decline in Professional Soccer Players after Repetitive Subconcussive Impacts: A Systematic Review and Meta-analysis
Tykocki T.
Neurologia Medico-Chirurgica (Tokyo). 2026;66(6):321–331.
This systematic review and meta-analysis evaluated the long-term risk of cognitive decline in professional soccer players exposed to repetitive subconcussive impacts throughout their careers. The findings suggest that chronic exposure to repetitive heading may increase the risk of impairments in memory, executive function, and other cognitive domains later in life. These results emphasize the importance of long-term neurological monitoring of athletes and highlight the need for reliable biomarkers capable of identifying early brain injury.
Current Research
Current research projects utilize 3 Tesla MRI, diffusion tensor imaging, tractography, and connectome analysis to investigate young soccer players exposed to repetitive heading. The primary objective is to identify early neurobiological alterations associated with subconcussive impacts and to develop evidence-based recommendations that improve the safety of football training for children and adolescents.
By integrating advanced neuroimaging with clinical neuroscience and sports medicine, these studies aim to establish the scientific foundations for modern neurological injury prevention strategies that preserve the benefits of physical activity while protecting long-term brain health.