TABLE 1.

Example of the electronic search strategy performed via PubMed.

Search number	Search terms
1	“diffusion tensor imaging” OR dti OR “diffusion tensor” OR “diffusion magnetic resonance imaging” OR “diffusion weighted imaging” OR DWI OR “fractional anisotropy” OR “mean diffusivity” OR “apparent diffusion coefficient” OR “radial diffusivity” OR “axial diffusivity” OR “white matter”
2	subconcuss* OR sub‐concuss* OR repetitive OR repeated OR recurrent OR multiple OR subclinical OR sub‐clinical OR cumulative OR chronic
3	impact* OR hit OR hits OR blow* OR event*
4	#2 AND #3
5	“head injur*” OR “brain injur*” OR “head trauma*” OR “brain lesion*” OR concuss* OR “traumatic brain injury” OR “sport‐related concussion” OR heading
6	#4 OR #5
7	sport* OR athlete*
8	#1 AND #6 AND #7