Does a land-based compensatory strength-training programme influences the rotator cuff balance of young competitive swimmers?
During the repeated execution of the swimming strokes, the shoulder adductor and internal rotator muscles have a tendency to become proportionally stronger when compared to their antagonist group. This can lead to muscle imbalances. The aim of this study was to examine the effects of a compensatory training programme on the strength and balance of shoulder rotator muscles in young swimmers. A randomized controlled trial design was used. Forty male swimmers took part in the study and were randomly divided into two groups: an experimental group (n = 20) and a training group (n = 20). A control group (n = 16) of young sedentary male students was also evaluated. The experimental group subjects participated in a 16-week shoulder-strength programme with Thera-Band® elastic bands; the training group was restricted to aquatic training. Peak torque of shoulder internal rotator and external rotator (ER) was measured at baseline and after 16 weeks. Concentric action at 1.04 rad s(-1) (3 reps) and 3.14 rad s(-1) (20 reps) was measured using an isokinetic dynamometer. The strength-training programme led to an improvement of the ER strength and shoulder rotator balance in the experimental group (data from both shoulders at 1.04 rad s(-1)). Moreover, concentric action at 3.14 rad s(-1) presented significant differences only for the dominant shoulder. Findings suggest that the prescribed shoulder-strengthening exercises could be a useful training option for young competitive swimmers. They can produce an increase in absolute strength values and greater muscle balance in shoulder rotators.
a Departamento de Desporto e Saúde, Escola de Ciência e Tecnologia , Universidade de Évora , Évora , Portugal.|b Research Centre in Sports Sciences, Health Sciences and Human Development, CIDESD, STRONG Research Community , University of Évora , Évora , Portugal.
Nuno
N
Batalha
a Departamento de Desporto e Saúde, Escola de Ciência e Tecnologia , Universidade de Évora , Évora , Portugal.|b Research Centre in Sports Sciences, Health Sciences and Human Development, CIDESD, STRONG Research Community , University of Évora , Évora , Portugal.
Armando
A
Raimundo
a Departamento de Desporto e Saúde, Escola de Ciência e Tecnologia , Universidade de Évora , Évora , Portugal.|b Research Centre in Sports Sciences, Health Sciences and Human Development, CIDESD, STRONG Research Community , University of Évora , Évora , Portugal.
Pablo
P
Tomas-Carus
a Departamento de Desporto e Saúde, Escola de Ciência e Tecnologia , Universidade de Évora , Évora , Portugal.
João
J
Paulo
c Physical Education Post-Graduation Program , Federal University of Rio de Janeiro , Rio de Janeiro , RJ , Brazil.
Roberto
R
Simão
b Research Centre in Sports Sciences, Health Sciences and Human Development, CIDESD, STRONG Research Community , University of Évora , Évora , Portugal.
António J
AJ
Silva
D000293:Adolescent; D006801:Humans; D007700:Kinetics; D008297:Male; D053580:Muscle Strength / Q000502:physiology; D018482:Muscle, Skeletal / Q000502:physiology; D016059:Range of Motion, Articular / Q000502:physiology; D055070:Resistance Training / Q000379:methods*; D017006:Rotator Cuff / Q000502:physiology*; D012785:Shoulder Joint / Q000502:physiology; D013550:Swimming / Q000502:physiology*
isokinetic strength; muscular balance; shoulder rotators; strength training