Déficit bilateral nos movimentos de flexão e extensão de perna e flexão do cotovelo

Chaves, Christianne Pereira Giesbrecht; Guerra, Cláudia Porto Corrêa; Moura, Silvia Regina Gonçalves de; Nicoli, Antonio Izidoro Vieira; Idemar, Félix; Simão, Roberto

doi:10.1590/s1517-86922004000600007

Cited by 6 publications

(12 citation statements)

References 19 publications

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“…This episode was probably reached by greater neural drive for the non-dominant limb, by the existence of possible deficiencies in the intermuscular coordination levels during movement, causing greater recruiting of motor units. Opposite data were found by Simão et al 9,10 and Chaves et al 11 , in which unilateral differences were not observed in load and maximum muscular power 6 . Some considerations must be mentioned concerning our findings.…”

Section: Contractionmentioning

confidence: 69%

“…When load, power and maximum repetitions until exhaustion are analyzed, Simão et al 9,10 and Chaves et al 11 verified the existence of bilateral deficit related to maximal load, but the same episode did not occur with maximal muscular power 9 . It is supposed that uni and bilateral maximal contractions are characterized concerning their neuromuscular activation, by the recruiting of many muscular groups or in many frequencies through a parallel process of intermuscular coordination.…”

Section: Introductionmentioning

confidence: 99%

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Déficit bilateral em exercício multiarticular para membros superiores

Nazário-de-Rezende

Haddad

Sousa

et al. 2012

Rev Bras Med Esporte

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Muscular strength is an important component for physical activity and performance of daily living activities. A phenomenon usually observed is that the capacity of generating maximum strength is compromised when the homologous extremities bilaterally contract. This phenomenon is called bilateral deficit. Thus, the aim of this work was to compare the electrical activity of the deltoid muscle, medial portion, during unilateral and bilateral contractions in a converging articulated military press machine, with 90% of maximum voluntary load (MVL), in nine men aged between 20 and 30 years, stature of 174 ± 5cm and body mass of 78 ± 15 kg. The myoelectrical signals were obtained through placement of differential active surface electrodes by EMG System of Brazil, a reference electrode (ground) and a signal conditioner module (electromyograph), which provided numerical data in RMS (root mean square) for results analysis. Each signal collected picked only the concentric phase of the movement and it had duration of three seconds. The results evidenced that during bilateral and unilateral exercise with 90% of MVL, the electric activity of the non-dominant extremity was significantly higher than in the dominant one (p = 0.018). When the values obtained in the work of dominant extremity are summed with the work of non-dominant extremity in the bilateral exercise (2.231 ± 504µv) and compared with the values obtained in the unilateral work (2.663 ± 701µv), bilateral deficit was found (p = 0.018). According to our study, it was verified that the bilateral deficit phenomenon is present in the medium deltoid muscle in the converging multiarticular military press exercise in individuals familiarized with resistance exercises.

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Section: Contractionmentioning

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Déficit bilateral em exercício multiarticular para membros superiores

Nazário-de-Rezende

Haddad

Sousa

et al. 2012

Rev Bras Med Esporte

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“…According to some authors, such difference called bilateral deficit, can be associated to the following aspects: reduced stimulation of motor units, neural recruiting differentiated by the crossed effect in the extra-pyramidal tract, fiber differences in the limbs, predominance of use of one limb over the other, resulting in a lower production of strenght (11)(12)(13) . Although the mechanisms responsible for the bilateral deficit are not very clear yet, it seems to be a consensus that the execution of the RE with simultaneous muscular actions tend to reduce the bilateral deficit, in relation to the work represented by the sum of the unilateral action of the strenght (10,14,15) .…”

Section: Introductionmentioning

confidence: 99%

Existe déficit bilateral na realização de 10RM em exercícios de braços e pernas?

Monteiro

Simão

2006

Rev Bras Med Esporte

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Resistance exercises can be done uni or bilaterally. Depending on the way by which the movement is conducted, the presence of bilateral deficit (BD) is observed. BD studies have concentrated their effort on the investigation of the phenomenon in exercises done with one single maximum repetition and little is known about their behavior in exercises with many repetitions. The aims of this study were: a) to compare the load in 10 repetition maximum (10RM) in the different sides of the body in exercises done with arms and legs. b) To compare the sum of the unilateral actions with the bilateral results in the same exercises. Twenty trained women between 18 and 30 years old (24 ± 6) were evaluated in uni and bilateral 10RM test in the selected exercises. The statistics analysis was t-test paired, to verify the difference between limbs and the sum of the two limbs separately in relation to bilateral load. Significance level was p < 0.05 for all procedures. No difference was found in the manipulated loads in both members, the same not occurring with the sum of unilateral load compared to bilateral. This demonstrates that the practice of bilateral work in routine situation of training involving 10RM promotes a greater manipulation of load in relation to unilateral work, differently from what is seen in BD in 1RM. In conclusion, at least in the selected exercises, BD was not found. Future studies should be done for better understanding of the BD phenomenon during training routine.

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“…No estudo de Chaves et al 18 , foram encontrados resultados similares para o déficit bilateral em relação às cargas máximas para o movimento de extensão de joelhos, porém não foram evidenciados resultados significativos para o surgimento do déficit bilateral no movimento de flexão de joelhos realizado na cadeira flexora. Nossos achados reportaram que os indivíduos que realizaram reconstrução do LCA com autoenxerto dos músculos flexores do joelho, além de apresentarem o déficit bilateral, também possuem uma redução da força máxima no MO.…”

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“…Esse fato pode ter contribuído para as diferenças de força entre os membros encontradas nesse estudo. Dessa forma, a amostra selecionada pode ser uma das variáveis que justifica o déficit bilateral encontrado no movimento de flexão de joelhos e a diferença de força entre os membros, fato não reportado em estudos anteriores, realizados com indivíduos não operados 18 . O déficit de força bilateral também pode estar relacionado ao nível de condicionamento do indivíduo.…”

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Déficit bilateral de força pós-reconstrução do ligamento cruzado anterior. DOI: 10.5007/1980-0037.2012v14n1p93

Bezerra

Simão

et al. 2012

Rev. Bras. Cineantropom. Desempenho Hum.

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Resumo -Os objetivos do presente estudo foram verificar diferenças de carga entre o membro operado (MO) e o membro não operado (MNO) e comparar a soma das ações unilaterais com as bilaterais em um teste de 10 repetições máximas (10RM), nos movimentos de extensão e flexão de joelhos, em indivíduos pós-reconstrução do ligamento cruzado anterior (LCA). Participaram do estudo vinte homens (37,8±5,7 anos; 179,2±4,9 cm; 87,1±7,5 kg) submetidos à reconstrução do LCA com autoenxerto em um segmento, testados em dois dias distintos na cadeira extensora e flexora. Utilizou-se o teste-t student dependente com p≤0,05 como nível de significância. Os valores encontrados para a o MO são menores em relação ao MNO (p<0,05), assim como, o somatório de carga unilateral é maior que a carga obtida bilateralmente, (p<0,05), em ambos os movimentos. Em conclusão, foi identificado o déficit bilateral para os dois movimentos analisados, assim como, diferença na força máxima entre o MO e MNO. Palavras-chave: Atividade motora; Força muscular; Reabilitação. Abstract -The aims of this study were verify the differences between the operated limb (OL) and non-operated limb (NOL) and compare the sum of unilateral actions with bilateral results following the test of 10 repetitions maximum (10RM) for the movements of extension and flexion of the knee in patients after reconstruction of anterior cruciate ligament (ACL).Twenty men (37.8±5.7 years; 179.2±4.9 cm; 87.1±7.5 kg)

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Déficit bilateral nos movimentos de flexão e extensão de perna e flexão do cotovelo

Cited by 6 publications

References 19 publications

Déficit bilateral em exercício multiarticular para membros superiores

Déficit bilateral em exercício multiarticular para membros superiores

Existe déficit bilateral na realização de 10RM em exercícios de braços e pernas?

Déficit bilateral de força pós-reconstrução do ligamento cruzado anterior. DOI: 10.5007/1980-0037.2012v14n1p93

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