Evaluation of rotator cuff muscle strength in healthy individuals

Introdução: A diminuição da capacidade de exercer esforços por parte dos músculos rotadores pode criar uma variedade de problemas. O conhecimento preciso do nível de força muscular de um indivíduo é importante, tanto para a avaliação da capacidade funcional ocupacional, como para uma apropriada prescrição de exercícios atléticos e de reabilitação. Percebe-se escassez de informação sobre as articulações do ombro, bem como os fatores envolvidos na força muscular dessa região. O objetivo deste estudo foi comparar a força gerada pelos músculos do manguito rotador entre o membro superior direito e o membro superior esquerdo em indivíduos saudáveis. Métodos: Participaram do estudo 22 sujeitos do sexo masculino, com idade de 18 e 19 anos, militares, saudáveis e sem história clínica de patologia ortopédica ou qualquer tipo de lesão no sistema musculoesquelético. Foram aplicados dois testes de força: Rotação Interna e Rotação Externa. Resultado : A força média de rotação interna no membro superior direito (MSD) foi maior que a força média de rotação interna no membro superior esquerdo (MSE) (p=0,723) e a força de rotação externa no MSD foi menor que a força média de rotação externa no MSE (p=0,788). Não houve diferença estatística na comparação dos valores de força de todos os testes de força isométrica. Conclusão: Para amostra estudada e metodologia utilizada na avaliação da força muscular, não houve diferença estatística na comparação da força gerada pelos músculos do manguito rotador do membro superior direito e do membro superior esquerdo.Rotator Cuff Muscle Strength in Healthy Individuals Introduction: Decreased ability to exert efforts by the rotator muscles can create a variety of problems. The precise knowledge of the level of muscular strength of an individual is important for both the functional capacity evaluation for occupational as an appropriate exercise prescription and rehabilitation of athletic. It is perceived scarcity of information on the shoulder joints as well as factors involved in muscle strength in this region. Objective: Develop a device for measuring the strength generated by the muscles of the upper limbs and the verification of efficiency and adaptability of this device through a comparative study of muscle strength in healthy subjects. Methods: The study included 22 male subjects, aged 18 and 19 years, military personnel, body mass between 57.7 and 93 kg (71.8 ± 9.45 kg) and height between 1.67 and 1.90 m (1.75 ± 0.06 m), healthy and without a history of orthopaedic disease or any kind of damage to the musculoskeletal system. Three strength tests were applied: Internal Rotation and External Rotation. For each type of effort three maximum voluntary contractions were required for 10 seconds, with an interval of 30 seconds between each contraction. Results: Internal rotation in the right upper limb (RUL) was higher than the average strength of internal rotation in the left upper limb (LUL) (p = 0, 723) and the external rotation strength in RUL was lower than the average strength of external rotation in the LUL (p=0,788). No statistical difference in comparing the strength values of all isometric strength tests. Conclusion: For sample and methodology used to assess muscle strength, there was no statistical difference in comparing the force generated by the muscles of the rotator cuff of the right and left upper limb.

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Assessment of rotator cuff muscle strength and shoulder rotation range of motion in subjects with lateral epicondylitis

International Journal of Medical Science and Public Health ◽

10.5455/ijmsph.2019.0720706082019 ◽

2019 ◽

pp. 1

Author(s):

Akta Bhalara ◽

Megha Sheth

Keyword(s):

Rotator Cuff ◽

Muscle Strength ◽

Range Of Motion ◽

Lateral Epicondylitis ◽

Rotator Cuff Muscle

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Efficacy of throwing exercise with TheraBand in male volleyball players with shoulder internal rotation deficit: a randomized controlled trial

BMC Musculoskeletal Disorders ◽

10.1186/s12891-020-03414-y ◽

2020 ◽

Vol 21 (1) ◽

Author(s):

Mohsen Moradi ◽

Malihe Hadadnezhad ◽

Amir Letafatkar ◽

Zohre Khosrokiani ◽

Julien S. Baker

Keyword(s):

Rotator Cuff ◽

Muscle Strength ◽

Muscle Activation ◽

Position Sense ◽

Joint Position Sense ◽

Emg Activity ◽

Control Group ◽

Joint Position ◽

Rotator Cuff Muscle ◽

Volleyball Players

Abstract Background The Glenohumeral internal-rotation deficit (GIRD) is related to the altered eccentric external-rotator (ER), the concentric internal-rotator (IR), muscle strength, and the ER: IR ratio. GIRD has been documented as a risk factor for shoulder injuries. However, few studies have investigated the effect of an exercise training on these parameters in athletes with GIRD. Therefore, the purpose of this study was to evaluate the effects of an 8-week throwing exercise with a TheraBand for retraining the rotator cuff on Electromyography (EMG) activity of selected muscles, rotator cuff muscle strength, the glenohumeral (GH) joint IR range of motion (ROM) and GH joint position sense in asymptomatic male volleyball players with GIRD. Methods Sixty male volleyball players with GIRD were randomized into either a training group or a control group. The experimental group underwent an 8-week throwing exercise with a TheraBand including 5 sessions of stretching and 3 sessions of strengthening exercises per week. The control group received an active self-exercise program. EMG (onset time and muscle activation), shoulder range of motion (ROMs), strength and GH joint position sense were all assessed pre and post trainings. Results There were statistically significant within-group differences in the EMG activity of the anterior deltoid (p = 0.005), middle deltoid (p = 0.007), posterior deltoid (p = 0.004), infraspinatus (p = 0.001) and supraspinatus (p = 0.001) muscles, IR ROM (p = 0.001), rotator cuff muscle strength ratio (p = 0.001), and GH joint position sense (p = 0.033) in the experimental group. A 2 × 2 analysis of variance with a mixed model design and independent and paired t-tests were used for statistical analysis. Conclusions Throwing exercise with a TheraBand improved shoulder muscle activation, IR ROM, rotator cuff muscle strength ratio and GH joint position sense in participants with GIRD. These findings may improve the treatment of GIRD in a clinical setting. Although the results are significant, further studies should follow up the long-term effects of the Throwing exercise with a TheraBand on GIRD. Trial registration Current Controlled Trials using the UMIN-RCT website with ID number of, UMIN000038416 “Retrospectively registered” at 2019/10/29.

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Effects of 8 Weeks’ Specific Physical Training on the Rotator Cuff Muscle Strength and Technique of Javelin Throwers

Journal of Physical Therapy Science ◽

10.1589/jpts.26.1553 ◽

2014 ◽

Vol 26 (10) ◽

pp. 1553-1556 ◽

Cited By ~ 7

Author(s):

Hyeyoung Kim ◽

Youngsun Lee ◽

Insik Shin ◽

Kitae Kim ◽

Jeheon Moon

Keyword(s):

Rotator Cuff ◽

Muscle Strength ◽

Physical Training ◽

Rotator Cuff Muscle ◽

Javelin Throwers

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Effects of Anthropometric Scaling on Rotator Cuff Muscle Strength

Medicine & Science in Sports & Exercise ◽

10.1249/01.mss.0000385425.82354.23 ◽

2010 ◽

Vol 42 ◽

pp. 574

Author(s):

Wendy Hurd ◽

Bernard Morrey ◽

Kenton Kaufman

Keyword(s):

Rotator Cuff ◽

Muscle Strength ◽

Rotator Cuff Muscle

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Delayed Rehabilitation Protocol after Rotator Cuff Repair

Osteology ◽

10.3390/osteology1010003 ◽

2020 ◽

Vol 1 (1) ◽

pp. 29-38

Author(s):

Alessandra Berton ◽

Sergio De Salvatore ◽

Vincenzo Candela ◽

Gabriele Cortina ◽

Daniela Lo Presti ◽

...

Keyword(s):

Rotator Cuff ◽

Muscle Strength ◽

Internal Rotation ◽

Outcome Measures ◽

Rotator Cuff Repair ◽

External Rotation ◽

Shoulder Function ◽

Rehabilitation Protocol ◽

Patient Reported ◽

Cuff Repair

Rotator cuff tears are a frequent cause of shoulder pain that often require arthroscopic repair. After surgery an intense and well-studied rehabilitation protocol is needed to obtain the complete recovery of shoulder function. Fifty patients, who sustained arthroscopic rotator cuff repair for symptomatic, atraumatic and full-thickness supraspinatus tendon tear, were involved. According to our rehabilitation protocol, during the first four postoperative weeks, the arm was supported with an abduction sling pillow, and pendulum exercises, table slide and active elbow extension and flexion were conceded. Outcome measures (Oxford shoulder score (OSS), simple shoulder test (SST), patient-reported satisfaction), shoulder function (range of motion (ROM) and muscle strength), and MRI examination were evaluated. The mean OSS score and SST score increased from 16 to 30.2 and from 5.3 to 11.4, respectively. Patient-reported satisfaction was 96%. At 12 months, patients improved ROM and muscle strength. Postoperative passive anterior elevation was 176; external rotation averaged 47; internal rotation was 90. Postoperative muscle strength during anterior elevation was 8.3 ± 2.2 kg, internal rotation 6.8 ± 3 kg, external rotation 5.5 ± 2.3 kg. Five out of seven patients with recurrent tears evaluated their results as satisfactory. They reported improvements in terms of OSS and SST mean scores despite recurrent tears; therefore, they did not undergo revision surgery. The delayed postoperative physical therapy protocol was associated with improvements in the outcome measures and shoulder function compared to the preoperatory state and rotator cuff healing demonstrated by MRI.

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