The initial effects of a sustained glenohumeral postero-lateral glide during elevation on shoulder muscle activity: A repeated measures study on asymptomatic shoulders

Ribeiro, Daniel Cury; Castro, Marcelo Peduzzi de; Sole, Gisela; Vicenzino, Bill

doi:10.1016/j.math.2015.10.014

Cited by 18 publications

(23 citation statements)

References 31 publications

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“…After skin preparation, surface electrodes (Ag/ AgCl) were placed as recommended in the literature [23][24][25] under bipolar configuration for the upper trapezius (UT), middle deltoid (MD), posterior deltoid (PD) and infraspinatus (IS) muscles, whereas the reference electrode was positioned in the individual's collarbone (Figure 1).…”

Section: Methodsmentioning

confidence: 99%

“…After electrode placement, the subjects were instructed to sit in a chair with fixed support to perform maximal voluntary isometric contractions (MVIC) for each muscle evaluated in this study [23][24][25] . Collection of MVIC was randomized and consisted of two MVICs for each muscle, keeping the contraction for five seconds and with a three-minute interval between each repetition.…”

Section: Methodsmentioning

confidence: 99%

“…The infraspinatus MVIC was tested with the upper limb close to the body and the elbow flexed at 90°. The subject would then perform the movement of external rotation and the examiner put resistance at the elbow level [23][24][25] . The following movements were demonstrated and performed by the individuals, consisting of: (A) external rotation in orthostasis with elbow flexion at 90°; (B) external rotation with shoulder abduction and 90° elbow flexion; (C) external lateral decubitus (LD) rotation and 90° elbow flexion ( Figure 2).…”

Section: Methodsmentioning

confidence: 99%

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Análise eletromiográfica de músculos do complexo do ombro durante exercícios de rotação externa com faixa elástica

2019

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RESUMO Na artrocinemática do ombro, o manguito rotador atua estabilizando a cabeça umeral em contato com a cavidade glenoidal, enquanto realiza a translação inferior para contrabalancear a força rotacional promovida principalmente pelo deltoide. Exercícios de rotação externa (RE) vêm sendo utilizados na reabilitação de pacientes com disfunções no complexo do ombro buscando restaurar a artrocinemática. Porém, poucos estudos abordam a utilização da faixa elástica e a avaliação dos músculos da cintura escapular, determinantes para uma cinemática adequada. O objetivo deste estudo é comparar a atividade eletromiográfica (EMG) de músculos do complexo do ombro durante exercícios de rotação externa com faixa elástica. Participaram 11 sujeitos do sexo masculino que foram avaliados durante os movimentos de (1) RE em ortostase; (2) RE com abdução de ombro; (3) RE em decúbito lateral (DL). Os músculos avaliados pela EMG foram: (1) trapézio superior (TS); (2) deltoide médio (DM); (3) deltoide posterior (DP); e (4) infraespinal (IN). A resistência foi determinada por uma faixa elástica cinza calibrada com carga de 5% do peso corporal. A análise dos dados foi realizada no software Biomec-SAS e as estatísticas foram calculadas por meio da Anova de medidas repetidas no software SPSS v20.0. Pôde-se constatar que os músculos TS e DM obtiveram maior atividade EMG durante o exercício de RE com abdução de ombro, o músculo DP durante a RE com abdução de ombro e RE em decúbito lateral, enquanto o IN a obteve durante a RE em ortostase e RE em decúbito lateral.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Análise eletromiográfica de músculos do complexo do ombro durante exercícios de rotação externa com faixa elástica

2019

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“…For the anterior deltoid, the electrodes were placed at one finger width away and anterior to the acromion. For the medial deltoid, the electrodes were placed 3 cm below the acromion, over the muscle bulk, aligned with the muscle fibers [ 32 ]. For the vastus lateralis, electrodes were placed at 2/3 on the line from the anterior spina iliaca superior to the lateral side of the patella.…”

Section: Methodsmentioning

confidence: 99%

Assessment of Whole Body and Local Muscle Fatigue Using Electromyography and a Perceived Exertion Scale for Squat Lifting

Ahmad

Kim

2018

IJERPH

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This research study aims at addressing the paradigm of whole body fatigue and local muscle fatigue detection for squat lifting. For this purpose, a comparison was made between perceived exertion with the heart rate and normalized mean power frequency (NMPF) of eight major muscles. The sample consisted of 25 healthy males (age: 30 ± 2.2 years). Borg’s CR-10 scale was used for perceived exertion for two segments of the body (lower and upper) and the whole body. The lower extremity of the body was observed to be dominant compared to the upper and whole body in perceived response. First mode of principal component analysis (PCA) was obtained through the covariance matrix for the eight muscles for 25 subjects for NMPF of eight muscles. The diagonal entries in the covariance matrix were observed for each muscle. The muscle with the highest absolute magnitude was observed across all the 25 subjects. The medial deltoid and the rectus femoris muscles were observed to have the highest frequency for each PCA across 25 subjects. The rectus femoris, having the highest counts in all subjects, validated that the lower extremity dominates the sense of whole body fatigue during squat lifting. The findings revealed that it is significant to take into account the relation between perceived and measured effort that can help prevent musculoskeletal disorders in repetitive occupational tasks.

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“…[1][2][3][4] The dynamic relocation test (DRT) was designed to test the ability of the rotator cuff muscles to stabilize the humeral head in the glenoid against a de-stabilizing load or traction. 5 The procedure can also be used as an exercise to enhance the control of such muscles.…”

Section: Introductionmentioning

confidence: 99%

Shoulder muscle activity during the modified dynamic relocation test and side-lying shoulder external rotation: a cross-sectional study on asymptomatic individuals

Ribeiro

Shemmell

Falling

et al. 2016

Journal of Manual & Manipulative Therapy

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Objectives: (1) to compare activity levels between monitored muscles during the dynamic relocation test (DRT); (2) to assess changes in muscle activation variability over 10 trials; (3) to assess within-muscle difference activity levels between the DRT and the unloaded side-lying shoulder external rotation exercise. Methods: This is a cross-sectional, laboratory-based, repeated measures study. Thirty asymptomatic individuals performed the DRT and unloaded side-lying external rotation. The order of exercises was randomized. Superficial electromyography was used for recording the supraspinatus, infraspinatus, middle deltoid, posterior deltoid, pectoralis major, and latissimus dorsi muscles. The main outcome measures were mean muscle activity, expressed as % of maximal isometric voluntary contraction. Results: We found significant between-muscles differences in activity (F t = 14.11, p < 0.001) during the DRT. Post hoc analysis suggested between-trial variability did not change over the 10 trials, (F = 18.2, p < 0.001). Within-muscle comparisons between the DRT and side-lying shoulder external rotation suggested significant differences between these exercises (F = 32.37, p < 0.001). Conclusions: considering the monitored muscles, supraspinatus, infraspinatus, pectoralis major, and latissimus dorsi are the main muscles contracting during the DRT. Of all monitored muscles, supraspinatus muscle was the only one presenting higher activity levels during the DRT when compared to the unloaded side-lying shoulder external rotation.

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The initial effects of a sustained glenohumeral postero-lateral glide during elevation on shoulder muscle activity: A repeated measures study on asymptomatic shoulders

Abstract: Background

Cited by 18 publications

References 31 publications

Análise eletromiográfica de músculos do complexo do ombro durante exercícios de rotação externa com faixa elástica

Análise eletromiográfica de músculos do complexo do ombro durante exercícios de rotação externa com faixa elástica

Assessment of Whole Body and Local Muscle Fatigue Using Electromyography and a Perceived Exertion Scale for Squat Lifting

Shoulder muscle activity during the modified dynamic relocation test and side-lying shoulder external rotation: a cross-sectional study on asymptomatic individuals

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