Clinical and ultrasonographic correlation between scapular dyskinesia and subacromial space measurement among junior elite tennis players.
OBJECTIVE
In this study, the hypothesis that tennis players with scapular dyskinesia present a smaller subacromial space than non-athletes was investigated. Additionally, the correlation between the size of the subacromial space and abnormalities in scapular movement during arm abduction was studied.


METHODS
Cross-sectional study.


METHODS
A total of 53 elite tennis players and 20 control participants were enrolled in the study. Participation was restricted to elite-level, junior tennis players who had no current shoulder pain or history of shoulder injuries.


METHODS
Each individual was examined for scapular dyskinesia by a single physician and by ultrasound, with the results analysed in a blind fashion by a single radiologist.


RESULTS
43.4% of the tennis players and 20% of control participants presented with scapular dyskinesia. Of the 106 shoulders evaluated, 39.6% of tennis players and 10% of control participants presented with scapular dyskinesia in the clinical examination (p = 0.005). Ultrasonographic measurements demonstrated that tennis players presented statistically smaller subacromial spaces compared with control participants (p<0.001). A decrease in the subacromial space was observed in tennis players when the shoulder was raised from 0 degrees to 60 degrees of abduction; however, dyskinesia-afflicted athletes demonstrated a significantly greater decrease following this movement (19.3 vs 13.8 mm, p = 0.002).


CONCLUSIONS
The results of this study demonstrated that tennis players with scapular dyskinesia present a smaller subacromial space than control participants. Furthermore, when the shoulder was analysed dynamically, moving from neutral abduction to 60 degrees of elevation, the tennis players with scapular dyskinesia presented a greater reduction in the subacromial space compared with unaffected athletes.
Silva
R T
RT
Orthopedics and Sports Medicine, Rua Botucatu 591, 18 Andar, Sao Paulo, CEP 04023-062, Brazil. rogerio@neo.org.br
Hartmann
L G
LG
Laurino
C F de Souza
CF
Biló
J P Rocha
JP
D000173:Acromioclavicular Joint / Q000000981:diagnostic imaging / Q000473:pathology*; D000293:Adolescent; D016022:Case-Control Studies; D002648:Child; D003430:Cross-Sectional Studies; D020820:Dyskinesias / Q000000981:diagnostic imaging / Q000473:pathology*; D005260:Female; D006801:Humans; D007592:Joint Diseases / Q000000981:diagnostic imaging / Q000473:pathology*; D008297:Male; D012540:Scapula / Q000000981:diagnostic imaging / Q000473:pathology*; D013715:Tennis; D014463:Ultrasonography