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|Title: ||Effects of shoulder compensatory strength training program in rotator cuff strength of young swimmers|
|Authors: ||Batalha, N.|
|Keywords: ||Strength Training|
|Issue Date: ||Jun-2010|
|Citation: ||Batalha, N.; Raimundo, A.; Tomas-Carus, P.; Fernandes, O.; Sousa, J.P.; Costa, A.M.; Silva, A.J.Effects of shoulder compensatory strength training program in rotator cuff strength of young swimmers, Trabalho apresentado em Biomechanics and Medicine in Swimming, In Proceedings of the Biomechanics and Medicine in Swimming Congress - Oslo 2010, Oslo, 2010.|
The purpose of this study was to evaluate de effects of 16 week compensatory strength
training program in shoulder strength and respective conventional ratios (concentric ER/IR).
A total of 40 national level male swimmers were assessed and randomly divided in two
groups – experimental group (N=20)-(age:14.65±0.67 years old, height:173.48±6.87 cm,
body mass:63.15±5.68 kg) and control group (N=20)-(age:14.60±0.60 years old, height:
170.79±6.48 cm, body mass:61.73±4.68 kg). Experimental subjects participated in a 16 week
shoulder strength program with Thera-Band® elastic bands (3 times a week). The peak-torque
of shoulder internal (IR) and external rotators (ER) was measured in both groups at baseline
and after 16 weeks. Concentric action at 60º/s (3 rep) and 180º/s (20 rep) were measured, in a
seated position, with the shoulder at 90º of abduction and the elbow flexed to 90º, using an
isokinetic dynamometer (Biodex System 3 – Biodex Corp., Shirley, USA). Anova with
repeated measures was used to determine significant main effects in shoulder rotators strength
and unilateral ER/IR ratios. The level of significance was set at 0.05.
Significant differences were found in all variables that measure the ER shoulder strength at
60º/s in dominant(DT) (P=0.031) and non-dominant(NDT) shoulder (P=0.001). Meanwhile
concentric action at 180º/s, only showed significant differences on DT shoulder (P=0.032). In
respect of ER/IR ratio, a compensatory strength training programme induces significant
differences in both shoulders at 60º/s (DT: P=0.001; NDT: P=0.001). At 180º/s we just found
significant effects on the DT ER/IR ratio (P=0.002).
The results of this study support earlier research  that showed that the unilateral shoulder
strength ratios increases substantially after a period of a strength training program. Since the
ratios describe the quality of muscular balance/imbalance , we can conclude that a 16 week
compensatory shoulder strength training program using Thera-Band® elastic bands, reduces
muscular imbalances in rotator cuff of competitive young swimmers. These results highlight
the useful of this kind of compensatory program to prevent shoulder injuries.|
|Appears in Collections:||DES - Artigos em Livros de Actas/Proceedings|
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