1 Correction to: Sports Medicine https://doi.org/10.1007/s40279-019-01058-0

Page 3, Section 2.1.1, sentence 4: This sentence, which previously read:

“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.”

should read:

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