"As ACL injury may alter intracortical facilitation [34] and depressed intracortical inhibition is correlated with decreased quadriceps voluntary activation capability [35], external focus training may provide a means to restore quadriceps muscle activity via increasing intracortical inhibition.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6828420PMC
http://dx.doi.org/10.1007/s40279-019-01078-wDOI Listing

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