Back muscle strength and fatigue in healthy and chronic low back pain subjects: A comparative study of 3 assessment protocols

Silva, Rubens Alexandre da; Arsenault, André; Gravel, Denis; Larivière, Christian; Oliveira, Eros de

doi:10.1016/j.apmr.2004.08.007

Cited by 55 publications

(53 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Entretanto, Elfiving et al (4) ao comparar os slopes entre homens do grupo controle e lombalgia, não encontraram diferenças estatisticamente significantes (P = 0,44), assim como Silva et al (15) nas alturas de L1 (P = 0,61) e L5 (P = 0,97). No estudo de Kankaanpää et al (27) , também não foram encontradas diferenças (P > 0,05) entre os dois grupos e isto foi atribuído aos procedimentos utilizados no método.…”

Section: Discussionunclassified

“…O declínio da FM durante contrações fatigantes é considerado como medida objetiva do processo de fadiga muscular (4,7) . Alguns estudos verificaram a análise espectral dos músculos parespinhais em indivíduos com e sem dor lombar em posturas estáticas e dinâmicas (10,12,14,15) . Estes estudos avaliam a fadiga dos músculos na posição ortostática ou em prono ao invés da posição sentada que é comum em atividades ocupacionais, tem melhor fixação da pelve, menos compensações e simula situações do cotidiano (16) .…”

Section: Introductionunclassified

See 1 more Smart Citation

Comparação da fadiga eletromiográfica dos músculos paraespinhais e da cinemática angular da coluna entre indivíduos com e sem dor lombar

Kawano

Souza

Oliveira

et al. 2008

Rev Bras Med Esporte

View full text Add to dashboard Cite

RESUMOIndivíduos com dor lombar têm redução na força e na resistência dos músculos paraespinhais. A avaliação da fadiga e da resistência dos músculos paraespinhais é importante, uma vez que tem sido reportado que indivíduos com lombalgia desenvolvem um déficit no condicionamento físico que influencia na força e na função do tronco. Além disso, ainda é incerto a relação da fadiga dos paraespinhais e o ângulo de flexão anterior de tronco. Os objetivos deste estudo foram comparar a fadiga em indivíduos com e sem dor lombar e correlacionar a fadiga com o ângulo de flexão anterior de tronco. O grupo lombalgia foi composto por dez indivíduos com diagnóstico médico exclusivo de lombalgia. O grupo controle foi composto por dez indivíduos que possuíam características físicas semelhantes. Inicialmente avaliou-se a flexão anterior de tronco dos indivíduos pelo método angular de Whistance. A fadiga dos músculos paraespinhais foi avaliada nas alturas de L1 e L5 por meio da eletromiografia de superfície em duas cargas: 50 e 75% da contração isométrica voluntária máxima. Os resultados do estudo indicaram que o grupo lombalgia apresentou menor força durante os testes de contração isométrica voluntária máxima (P < 0,004). Embora o grupo lombalgia tenha apresentado maior valor de fadiga, não houve diferença estatisticamente significante entre os dois grupos para as alturas de L1 e L5 nas duas cargas. As correlações entre a fadiga e o ângulo de flexão anterior de tronco mostraram-se de fracas a moderadas (valores entre r = -0,58 a 0,51). Estes achados indicam que ambos os grupos fadigam, entretanto o grupo lombalgia apresentou maior fadiga. Além disso, não se pode predizer a fadiga por meio do ângulo de flexão anterior de tronco.Palavras-chave: eletromiografia, análise espectral, fadiga, dor lombar. ABSTRACTSubjects with low back pain have reduction in strength and endurance of the erector spinae muscles. The assessment of the fatigue and the endurance of these muscles is important, once it has been reported that individuals with low back pain develop a deficit in physical conditioning which influences on trunk strength and function. Moreover, the relationship between back muscles fatigue and trunk forward flexion is still unclear. The aims of this study were to compare fatigue between individuals with and without low back pain and to correlate the muscles fatigue with the angle of trunk forward flexion. The low back pain group consisted of ten low back pain subjects. The control group was composed by ten subjects with similar physical characteristics and without low back pain. Initially, the trunk forward flexion was evaluated with the Whistance angular method. The erector spinae fatigue was assessed at L1 and L5 by surface electromyography on two loads: 50 and 75% of maximal voluntary isometric contraction. The results indicated that the low back pain group presented a lower strength output during maximal voluntary isometric contraction (P < 0.004). Although the low back pain group has presented greater values of fatigue, there ...

show abstract

Section: Discussionunclassified

Section: Introductionunclassified

Comparação da fadiga eletromiográfica dos músculos paraespinhais e da cinemática angular da coluna entre indivíduos com e sem dor lombar

Kawano

Souza

Oliveira

et al. 2008

Rev Bras Med Esporte

View full text Add to dashboard Cite

show abstract

“…Further studies should be conducted with kinematic analysis to ascertain the relationship between lordosis curvature and muscle fatigue during different Sorensen protocols and CLBP subjects. Some authors, comparing EMG fatigue indices of the back muscles between CLBP and healthy participants, observed that CLBP had a lower rate of back muscle fatigue [11,16,23], but others did not find significant differences [5,14]. A hypothesis that could explain these conflicting results is that CLBP subjects adopt alternative neuromuscular strategies that could modulate EMG fatigue indices of the back extensor muscles.…”

Section: Discussionmentioning

confidence: 86%

“…Elfving and Dedering [10] observed a greater rate of paraspinal muscle fatigue during a seated test compared to a modified Sorensen test (on a 40°Roman chair). Da Silva et al [5] tried three different fatigue protocols and noted that paraspinal muscle fatigue was lower during a lift position in comparison to Sorensen and upright tests. The results of these studies indicate a task-dependency effect.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Back and hip extensor muscles fatigue in healthy subjects: task-dependency effect of two variants of the Sorensen test

2008

View full text Add to dashboard Cite

Paraspinal muscle fatigability during various trunk extension tests has been widely investigated by electromyography (EMG), and its task-dependency is established recently. Hip extensor muscle fatigability during the Sorensen test has been reported. The aim of the present experiments was to evaluate the task-dependency of back and hip extensor muscle fatigue during two variants of the Sorensen test. We hypothesized that the rate of muscular fatigue of the hip and back extensor muscles varies according to the test position. Twenty healthy young males with no history of low back pain volunteered to participate in this cross-sectional study. They were asked to perform two body weight-dependent isometric back extension tests (S1 = Sorensen test; S2 = modified Sorensen on a 45°Roman chair). Surface EMG activity of the paraspinal muscles (T10 and L5 levels) and hip extensor muscles (gluteus maximus; biceps femoris) was recorded, and muscular fatigue was assessed through power spectral analysis of the EMG data by calculating the rate of median power frequency change. We observed hip extensor muscle fatigue simultaneously with paraspinal muscle fatigue during both Sorensen variants. However, only L5 level EMG fatigue indices showed a task-dependency effect between S1 and S2. Hip extensor muscles appear to contribute to load sharing of the upper body mass during both Sorensen variants, but to a different extent because L5 level fatigue differs between the Sorensen variants. Our findings suggest that task-dependency has to be considered when EMG variables are compared between two types of lumbar muscle-fatiguing tasks.

show abstract

Reliability of measurements of endurance time, electromyographic fatigue and recovery, and associations to activity limitations, in patients with lumbar disc herniation

Dedering

Gnospelius

Elfving

2010

Physiother. Res. Int.

View full text Add to dashboard Cite

show abstract

Back muscle strength and fatigue in healthy and chronic low back pain subjects: A comparative study of 3 assessment protocols

Cited by 55 publications

References 51 publications

Comparação da fadiga eletromiográfica dos músculos paraespinhais e da cinemática angular da coluna entre indivíduos com e sem dor lombar

Comparação da fadiga eletromiográfica dos músculos paraespinhais e da cinemática angular da coluna entre indivíduos com e sem dor lombar

Back and hip extensor muscles fatigue in healthy subjects: task-dependency effect of two variants of the Sorensen test

Reliability of measurements of endurance time, electromyographic fatigue and recovery, and associations to activity limitations, in patients with lumbar disc herniation

Contact Info

Product

Resources

About