Shoulder functional ratio in elite junior tennis players.
Phys Ther Sport
; 11(1): 8-11, 2010 Feb.
Article
em En
| MEDLINE
| ID: mdl-20129117
OBJECTIVE: To evaluate shoulder rotation strength and compare the functional ratio between shoulders of elite junior tennis players. DESIGN: This cross-sectional study evaluated muscular rotation performance of 40 junior tennis players (26 male and 14 female) with an isokinetic dynamometer. MAIN OUTCOME MEASURES: Strength variables of external (ER) and internal rotators (IR) in concentric and eccentric modes were considered. For the peak torque functional ratio, the eccentric strength of the ER and the concentric strength of the IR were calculated. RESULTS: All variables related to IR were significantly higher on the dominant compared to the non-dominant side in males and females (p<0.05), but only boys exhibited this dominance effect in ER (p<0.05 and p<0.001). Regarding functional ratios, they were significantly lower for the dominant shoulder (p<0.001) and below 1.00 for both groups, indicating that the eccentric strength of the ER was not greater than the concentric strength of the IR. CONCLUSION: Elite junior tennis players without shoulder injury have shoulder rotation muscle strength imbalances that alter the normal functional ratio between rotator cuff muscles. Although these differences do not seem to affect the athletic performance, detection and prevention with exercise programs at an early age are recommended.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Ombro
/
Articulação do Ombro
/
Tênis
/
Manguito Rotador
/
Força Muscular
/
Contração Muscular
Tipo de estudo:
Observational_studies
/
Prevalence_studies
/
Risk_factors_studies
Limite:
Adolescent
/
Child
/
Female
/
Humans
/
Male
Idioma:
En
Revista:
Phys Ther Sport
Assunto da revista:
MEDICINA ESPORTIVA
/
MEDICINA FISICA
Ano de publicação:
2010
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Reino Unido