Strength and muscle activity of shoulder external rotation of subjects with and without scapular dyskinesis

Uga, Daisuke; Nakazawa, Rie; Sakamoto, Masaaki

doi:10.1589/jpts.28.1100

Cited by 11 publications

(6 citation statements)

References 22 publications

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“…In patients with SD, the serratus anterior muscle was less recruited. Clinically, the consequent loss of strength was appreciated by the lesser upward rotation and the greater IR of the scapula [53,54]. Stabilizer muscle fatigue seems to decrease RC strength and to increase SD symptoms [55][56][57].…”

Section: Causes and Effects Of Sdmentioning

confidence: 99%

Scapular Dyskinesis: From Basic Science to Ultimate Treatment

Longo

Ambrogioni

Berton

et al. 2020

IJERPH

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Background: This study intends to summarize the causes, clinical examination, and treatments of scapular dyskinesis (SD) and to briefly investigate whether alteration can be managed by a precision rehabilitation protocol planned on the basis of features derived from clinical tests. Methods: We performed a comprehensive search of PubMed, Cochrane, CINAHL and EMBASE databases using various combinations of the keywords “Rotator cuff”, “Scapula”, “Scapular Dyskinesis”, “Shoulder”, “Biomechanics” and “Arthroscopy”. Results: SD incidence is growing in patients with shoulder pathologies, even if it is not a specific injury or directly related to a particular injury. SD can be caused by multiple factors or can be the trigger of shoulder-degenerative pathologies. In both cases, SD results in a protracted scapula with the arm at rest or in motion. Conclusions: A clinical evaluation of altered shoulder kinematics is still complicated. Limitations in observing scapular motion are mainly related to the anatomical position and function of the scapula itself and the absence of a tool for quantitative SD clinical assessment. High-quality clinical trials are needed to establish whether there is a possible correlation between SD patterns and the specific findings of shoulder pathologies with altered scapular kinematics.

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Section: Causes and Effects Of Sdmentioning

confidence: 99%

Scapular Dyskinesis: From Basic Science to Ultimate Treatment

Longo

Ambrogioni

Berton

et al. 2020

IJERPH

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“…External rotation isometric strength showed a similar trend; however, the difference was not significant ( p = 0.054). A previous study reported weakness in shoulder rotational strength with SD [ 46 , 47 ]. Judo athletes with a history of shoulder injury show reduced shoulder rotational strength [ 48 ].…”

Section: Discussionmentioning

confidence: 99%

Association of Scapular Dyskinesis with Neck and Shoulder Function and Training Period in Brazilian Ju-Jitsu Athletes

Jeong,

Kim

2023

Medicina

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Background and Objectives: Neck and shoulder injuries are common in Brazilian ju-jitsu (BJJ) athletes, and scapular dyskinesis (SD) is associated with these injuries. This study aimed to investigate the prevalence of SD in BJJ athletes, their neck and shoulder function and strength, and the BJJ training period. Materials and Methods: Forty-eight BJJ athletes participated in the study. Years of experience with BJJ, belt, shoulder internal and external rotation strength, neck strength, neck disability index (NDI), and SD were measured. Results: Approximately 31 BJJ athletes (64.6%) showed SD, and the nondominant arm showed a more obvious SD (n = 22, 45.8%) than the dominant arm (n = 18, 37.5%). Those with over five years of BJJ training experience showed a significantly higher rate of SD (p = 0.006) than those with less than five years of experience. Shoulder isometric internal rotation strength was significantly weaker in the obvious SD group than in the normal SD group (p = 0.014). Neck isometric strength and NDI did not differ significantly between individuals with or without SD. Conclusions: SD was common among BJJ athletes, and more experienced BJJ athletes exhibited higher rates of SD. Shoulder rotational strength was weaker with SD. Further studies are necessary on the neck and shoulders of BJJ athletes with SD.

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“…However, LSST applied in two other studies showed a very low SD prevalence [24,47]; overhead athletes accounted for 61% of the study population [48], which was much lower than in our results. Overhead athletes can exhibit SD due to repetitive overhead throwing using the scapular thoracic muscles [49,50]. Office workers experience prolonged sitting, poor work ergonomics, poor posture, repetitive work, neck and shoulder muscle fatigue, and pain [25].…”

Section: Discussionmentioning

confidence: 99%

Neck and Shoulder Pain with Scapular Dyskinesis in Computer Office Workers

Moon,

Kim

2023

Medicina

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Background and Objectives: Computer office workers spend long periods in front of a computer, and neck and shoulder pain are common. Scapular dyskinesis (SD) is associated with neck and shoulder pain. However, SD in computer office workers has not been elucidated. We aimed to investigate the prevalence of SD, neck and shoulder pain, disability, and working hours in computer office workers. Materials and Methods: In total, 109 computer office workers participated in this study. The results of a scapular dyskinesis test (SDT), lateral scapular slide test (LSST), neck disability index (NDI), shoulder pain and disability index (SPADI), visual analog scale (VAS) scores of the neck and shoulder, and working hours were recorded. Results: Ninety-eight computer office workers (89.9%) had SD. Computer office workers with SD had significantly higher NDI (p = 0.019), neck VAS (p = 0.041), and dominant shoulder VAS scores (p = 0.043). The LSST results showed a significantly greater distance (p = 0.016) in participants with SD. Conclusions: The prevalence of SD was very high in computer office workers, and neck and shoulder pain were more prevalent in workers with obvious SD.

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Strength and muscle activity of shoulder external rotation of subjects with and without scapular dyskinesis

Cited by 11 publications

References 22 publications

Scapular Dyskinesis: From Basic Science to Ultimate Treatment

Scapular Dyskinesis: From Basic Science to Ultimate Treatment

Association of Scapular Dyskinesis with Neck and Shoulder Function and Training Period in Brazilian Ju-Jitsu Athletes

Neck and Shoulder Pain with Scapular Dyskinesis in Computer Office Workers

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