Table 1

Search strategy and results of the systematic literature search, with total number of unique articles per database

Electronic database No of citations
Ovid MEDLINE (R) In-Process & Other Non-Indexed Citations3034
CINAHL 1546
PsycINFO304
Cochrane Databases for Systematic and Complete Review18
Cochrane Central Register of Controlled Trials56
Cochrane Injuries Group Trials Register3
SPORTDiscus1556
EMBASE4472
ERIC47
Conference Proceedings Citation Index (via Web of Science)1803
ProQuest Dissertation & Theses Global Database169