Isokinetic Performance of Shoulder External and Internal Rotators in Adolescent Male Volleyball Athletes

Franceschini, Kelly Cristine; Nissola, Naíma; Zardo, Bruno Soldatelli; Tadielo, Gerson Sacilotto; Bonetti, Leandro Viçosa

doi:10.3823/2011

Cited by 7 publications

(5 citation statements)

References 22 publications

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“…There were not significant differences in ER/IR ratio between both groups neither in both velocities, but the ER/IR ratio values were a little more than normal ratio values (ER/IR norm value of 65%-75%) 68,[70][71][72] for both male and female players. This results are in line with the findings of Franceschini et al, 60 in which the protocols and movements of the study were the same as our study but in Brazilian Volleyball players' population. A study found a relationship between an abnormal ER/IR ratio and the incidence of shoulder injuries among athletes of overhead sports.…”

Section: Discussionsupporting

confidence: 94%

“…These results illustrated muscle strength asymmetry in the glenohumeral of SV players, with the dominant upper extremity tending to produce greater values for PT compared to the nondominant side. These findings were in agreement with some studies with similar protocols of this study, but among elite conventional volleyball players from different countries which include: Franceschini et al 60 and Maledonça et al 61 (Brazilian players), Hadzic et al 62 (Slovenian players), Markou and Vagenas 63 (Greek players), Michael et al 64 (German players), Van Cingel et al 65 (Dutch players), and Wang et al 66 (English players).…”

Section: Discussionsupporting

confidence: 92%

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Physical and psychological aspects of Brazilian Sitting volleyball players

Ahmadi

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Start point of the Sitting volleyball (SV) was in the Netherlands in 1956 and also approved as an official Paralympic game in 1980. In Brazil, SV is a new sport and it was launched at the end of 2002. Nowadays, male's and female's Brazilian SV teams in World ParaVolley Ranking are on the second and third place, respectively. SV is a big simplicity that shows a real example of adaptation and implementation of a major team sports. This work is structured on the basis of three-chapter format, as well as introduction and conclusion sections. In the first chapter, "Physical performance aspects", we presented comparisons among the agility, endurance, power, speed, and strength factors of male and female Brazilian elite SV players. There were statistically significant higher values for males in agility, speed, endurance, and power factors than female players, but there was no significant difference between players in handgrip performance (strength). In addition, according to isokinetic dynamometer test, the male and female SV players had an asymmetrical rotational strength in their shoulder, preference for the dominant side in both groups. In the second chapter, "Anthropometry and body composition aspects", we described the body composition of male and female highlytrained Brazilian SV players and also compared the values obtained of this players by Skinfolds (SF) and Air-displacement plethysmography (ADP) methods. There were no significant differences between the mean values of players which measured by ADP and SF for body fat percentage (BF%) and body density (BD). The analysis of BF% and BD for all players comparing ADP to SF resulted in no significant systematic bias. Also a high degree of reliability was found between ADP and SF measures of BF% and BD. There were statistically significant positive correlations between BF% and BD in all values for both methods. In the third chapter, "Psychological aspects", we analysed the quality of life (QOL), lifestyle, and mood aspects of male and female elite Brazilian SV players. The results of this study demonstrated there were not significant differences in the psychological aspects between the male and female players. These chapters provided an overview of the elite Brazilian SV players in physical, and psychological aspects, in which in all aspects gender differences of this population were considered. In clinical implication perspective, the present research can be seen as a first step in establishing a reference base concerning physical and psychological aspects in this specific para-athlete population. Also, this reference base could help Paralympic coaches, physiotherapists and Para-sports physicians in the evaluation of SV players.

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Section: Discussionsupporting

confidence: 94%

Section: Discussionsupporting

confidence: 92%

Physical and psychological aspects of Brazilian Sitting volleyball players

Ahmadi

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“…In the study of sprint canoe athletes, in which the demands during the stroke are unilateral, Humphries et al (2000) did not show significant differences between the members in the analysis of ER and IR; however, they demonstrated isokinetic strength imbalance between the DL and NDL for flexors and extensors of the shoulder joint. Isokinetic studies with adolescent athletes of other sports with unilateral requirements of upper limbs such as volleyball (Franceschini et al, 2016), handball (Dos Santos Andrade et al, 2013), tennis (Ellenbecker et al, 2003;Saccol et al, 2010), and baseball (Noffal, 2003;Hurd et al, 2011), also showed differences between the limbs, with the MD presenting higher values of PT of the ER and/or IR.…”

Section: Discussionmentioning

confidence: 99%

Untitled

2017

JPES

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Abstract:Sprint kayak is water sport where stroke is the main movement for the kayak's propulsion, which is composed of cyclic and repetitive movements of the upper limbs. Considering the importance of generating movement and stabilizing the glenohumeral joint during the stroke, a detailed study of the shoulder's muscles is fundamental for improving sports performance and reducing injuries. The main objective of this study is to analyze the muscular performance of external rotators (ER) and internal rotators (IR) in the shoulders of adolescent sprint kayakers. The results demonstrated no significant differences between the limbs, whether for mean ER's and IR's peak torque values or for the external/internal rotators ratio. When analyzing the average values for the male and female sprint kayakers separately, the same results were observed. Conclusions: We concluded that the symmetrical bilateral upper limb demands and the no overhead movements during sprint kayakers' stroke can explain the absence of differences between the limbs' strength and the balance between ER and IR, respectively.

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“…Os resultados do presente estudo não demonstraram diferenças estatisticamente significativas na velocidade angular de 180º/s, entretanto a 60º/s o MD apresentou valores médios significativamente superiores ao do MND, tanto para a musculatura RE como da RI na análise do PT. Estudos isocinéticos com atletas de modalidades esportivas assimétricas, como voleibol [17,[19][20][21][22][23], handebol [24,25], tênis [26][27][28], basebol [29,30] e polo aquático [31] também demonstraram que o MD apresenta valores maiores de PT dos RE e/ou RI. A utilização preferencial de um dos membros durante os principais movimentos de uma determinada prática esportiva faz com que haja um aumento da força muscular desse membro.…”

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Desempenho muscular isocinético dos ombros em atletas de rúgbi

Tadiello¹,

Santos²,

Scopel³

et al. 2017

Sci Med

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RESUMOOBJETIVOS: Verificar a existência de assimetrias dos músculos rotadores externos e internos entre os dois ombros, em atletas amadores de rúgbi do gênero masculino. MÉTODOS: Avaliações isocinéticas de atletas amadores do rúgbi masculino foram acessadas a partir do banco de dados do Instituto de Medicina do Esporte e Ciências Aplicadas ao Movimento Humano da Universidade de Caxias do Sul (IME-UCS). Foram incluídas as avaliações do ombro e excluídos os casos sem assinatura do Termo de Consentimento Livre e Esclarecido Institucional do IME-UCS prévia ao teste. O dinamômetro isocinético foi utilizado no modo concêntrico-concêntrico para os rotadores externos e internos dos músculos dos ombros nas velocidades angulares de 60°/s e 180°/s. Foram analisados os valores do pico de torque e da razão rotadores externos/internos dos ombros desses atletas. Para verificar a existência de assimetrias entre os dois lados do mesmo indivíduo, foi utilizado o teste T de Student e considerado o nível de significância de <0,05. RESULTADOS: Foram analisados os dados de 12 atletas homens. Na análise do pico de torque na velocidade angular de 60º/s, os valores médios da musculatura do membro dominante apresentaram-se significativamente superiores quando comparados ao não dominante: rotadores externos, 43,35±4,72 Nm no membro dominante versus 38,92±4,22 Nm no membro não dominante (p=0,0012); rotadores internos, 65,58±11,88 Nm no membro dominante versus 61,69±11,98 Nm no membro não dominante (p=0,0021). A 180º/s, os valores médios do membro não dominante apresentaram uma tendência a valores inferiores quando comparado ao membro dominante, mas sem significância estatística. Com relação aos valores médios da razão rotadores externos/internos, não foram encontradas diferenças estatisticamente significativa em nenhuma das velocidades angulares analisadas. CONCLUSÕES: Os atletas amadores de rúgbi apresentaram um desempenho muscular inferior do membro não dominante quando comparado ao membro dominante na análise do pico de torque. Essa diferença não havia sido encontrada nos demais estudos com atletas de rúgbi e acreditamos que este resultado se justifique pela falta de treinamentos mais frequentes e adequados desses atletas amadores. DESCRITORES: força muscular; ombro; atletas; rúgbi.ABSTRACT AIMS: To verify the existence of shoulder external and internal rotator muscle asymmetries in male amateur rugby athletes. METHODS: Isokinetic evaluations of male amateur rugby athletes were accessed from the database of the Institute for Sports Medicine and Applied Sciences in Human Movement of Universidade de Caxias do Sul (IME-UCS). Shoulders evaluated were included in the study, whereas those cases without a free and informed consent form signed prior to the test were excluded. The isokinetic dynamometer was used in a concentric-concentric mode for the shoulder external and internal rotators at angular velocities of 60°/s and 180°/s. The peak torque and the external to internal rotator ratio were analyzed. Student's t test and a significance leve...

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Isokinetic Performance of Shoulder External and Internal Rotators in Adolescent Male Volleyball Athletes

Cited by 7 publications

References 22 publications

Physical and psychological aspects of Brazilian Sitting volleyball players

Physical and psychological aspects of Brazilian Sitting volleyball players

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Desempenho muscular isocinético dos ombros em atletas de rúgbi

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