Table A1.

Complete Search Strategy

Database	Search String	Comments
PUBMED	(anterior cruciate OR anterior cruciate ligament OR ACL) AND (reconstruct* OR surg*) AND (quadricep* OR extens*) AND (strength OR power OR torque)	Limited to English language
SPORTDiscus	(anterior cruciate OR anterior cruciate ligament OR ACL) AND (reconstruct* OR surg*) AND (quadricep* OR extens*) AND (strength OR power OR torque)	Limited to English language
EMBASE	“anterior cruciate ligament” AND (“reconstruct*” OR “surgery”) AND (“quadricep*” OR “exten*”) AND (“strength” OR “power” OR “torque”) AND [english]/lim AND [embase]/lim	Limited to English language and excluded MEDLINE results
CINAHL	(anterior cruciate OR anterior cruciate ligament OR ACL) AND (reconstruct* OR surg*) AND (quadricep* OR extens*) AND (strength OR power OR torque)	Limited to English language and excluded MEDLINE results
SCOPUS	“anterior cruciate ligament” OR “ACL” AND reconstruction AND quadricep* AND strength OR power OR torque AND NOT INDEX (medline) AND (LIMIT-TO (LANGUAGE, “English”))	Limited to English language and excluded MEDLINE results