Embase

((('weight lifting'/exp OR ((weight^* NEAR/3 lift^*) OR weightlift^*):ab,ti) AND (running/de OR triathlon/de OR (running OR triathlon^*):ab,ti) AND (gymnast^*):ab,ti) OR (crossfit^* OR cross-fit^*):ab,ti) 

PubMed

((((((weight lifting[MeSH]) OR weightlift^*[Title/Abstract]) OR weight lift^*[Title/Abstract])) AND (((Running[MeSH]) OR runner^*[Title/Abstract]) OR triathlon*[Title/Abstract])) AND ((gymnastics[MeSH]) OR gymnast*[Title/Abstract])) OR ((cross-fit^*[Title/Abstract]) OR crossfit^*[Title/Abstract])

Sport Discus

(CrossFit OR “cross fit”) AND

(prevalence OR incidence OR epidemiology OR frequency OR occurrence OR "risk factor") OR (injuries OR injury) OR ( DE "JOINT injuries" OR DE "MUSCULOSKELETAL system injuries" OR (DE "OVERTRAINING" OR DE "STRESS fractures (Orthopedics)" OR DE "OVERUSE injuries" OR DE "RUPTURE of organs, tissues, etc." OR DE "SOFT tissue injuries" OR DE "SPORTS injuries" OR DE "STRAIN (Physiology)" OR DE "SUBLUXATION" OR DE "MOVEMENT disorders" OR DE "DYSKINESIAS" OR DE "HYPERMOBILITY of joints"

Cinhal

(CrossFit OR “cross fit” ) AND ( (MH "Athletic Injuries+") or (“Athletic injuries”) OR (MH "Musculoskeletal Diseases+") or “musculoskeletal diseases” OR (MH "Overtraining Syndrome") OR "overtraining" OR (MH "Cumulative Trauma Disorders+") OR "overuse injuries" OR (MH "Wounds and Injuries+") OR (“rupture” or “dislocation”) OR (“injuries” OR “injury”) OR (“musculoskeletal”) ) OR ( (MH "Prevalence") OR (MH "Epidemiology+") OR (MH "Incidence") OR incidence OR prevalence OR epidemiology OR frequency OR occurrence OR “risk factor”)