Bouts of Passive Stretching after Immobilization of the Rat Soleus Muscle Increase Collagen Macromolecular Organization and Muscle Fiber Area

Coutinho, E.L.; DeLuca, Camila; Salvini, Tania F.; Vidal, Benedicto de Campos

doi:10.1080/03008200600995940

Cited by 48 publications

(56 citation statements)

References 51 publications

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“…The data of this study showed that in a 3 times a week frequency, the stretching protocol applied isolated in the intact muscle was sufficient to prevent connective tissue proliferation compared to muscles injured and submitted to laser and stretching, corroborated with Coutinho et al 33 Endorsing the effect of the stretching protocol applied in the intact muscles (SG), we found an increase in the serial sarcomere number compared to control group (CG). Other authors observed an addition in the serial sarcomere number of intact soleus muscle, applied 3 times a week, however, it was maintained for 40 min 27 .…”

Section: Discussionsupporting

confidence: 89%

Effects of GaAs laser and stretching on muscle contusion in rats

Corrêa¹,

Okita

Martins

et al. 2016

Fisioter. Pesqui.

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UFPR -Curitiba (PR), Brazil. 3ABSTRACT | Laser and stretching are used to treat skeletal muscle injuries. This study aimed to evaluate the effects of GaAs laser and stretching in the morphology of the tibialis anterior (TA) muscle after contusion. Thirty-six male rats (349±23g) were divided into six groups (n=6): control group (CG); lesion group (LG); lesion and laser group (LLG); lesion and stretching group (LSG); lesion, laser and stretching group (LLSG); and stretching group (SG). TA was wounded by a contusion apparatus. We used GaAs laser 4.5 J/cm 2 dose for 32 s each, beginning 48 h after lesion, for 7 days, once a day. Manual passive stretching was applied by 10 repetitions for 1 minute, initiating on the 8 th day, once a day, 3 times a week, during 3 weeks. After 4 weeks, rats were euthanized and we analyzed: muscle weight and length, cross sectional Se utilizó el tratamiento con láser GaAs con dosis de 4,5 J/cm 2 durante 32 s, iniciado 48 h después de la lesión, durante 7 días.El estiramiento pasivo manual consistió de 10 repeticiones de 1 minuto de duración, iniciado en el 8º día, 3 veces por semana, durante 3 semanas. Después de 4 semanas, los ratones sufrieron eutanasia para la retirada del TA para análisis de: peso y longitud musculares, área de sección trasversa de las fibras musculares (ASTFM), número de sarcómeros en serie (NSS), longitud de los sarcómeros y porcentaje de tejido conjuntivo. La comparación entre los grupos ocurrió mediante la Anova y post hoc Tukey, con nivel de significancia de ≤0,05. El número de sarcómeros en serie del GLLS fue mayor que el GLS. La longitud de los sarcómeros en el GLA fue superior al GLL, GLLA y GA. En el GA hubo aumento del NSS en comparación con el GC, mientras el porcentaje del tejido conjuntivo del GA disminuyó en comparación al del GLLA. Así, la sarcomerogénesis de los músculos lesionados fue aumentada por el uso del láser, estiramiento y por su asociación. El estiramiento fue suficiente para aumentar el NSS en músculos intactos. Palabras clave |

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Section: Discussionsupporting

confidence: 89%

Effects of GaAs laser and stretching on muscle contusion in rats

Corrêa¹,

Okita

Martins

et al. 2016

Fisioter. Pesqui.

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“…The use of stretching to prevent and treat contractures after immobilization is supported by numerous animal studies [3,8,12,30,32,39,40]. Ample evidence from these animal studies suggests that contracture management can be achieved through repeated or sustained stretching in the case of contractures not attributable to injury to the central nervous system [3,8,10,39,40].…”

Section: Introductionmentioning

confidence: 99%

Amount of Torque and Duration of Stretching Affects Correction of Knee Contracture in a Rat Model of Spinal Cord Injury

Moriyama¹,

Tobimatsu²,

Ozawa³

et al. 2013

Clinical Orthopaedics &Amp; Related Research

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Background Joint contractures are a common complication of many neurologic conditions, and stretching often is advocated to prevent and treat these contractures. However, the magnitude and duration of the stretching done in practice usually are guided by subjective clinical impressions. Questions/purposes Using an established T8 spinal cord injury rat model of knee contracture, we sought to determine what combination of static or intermittent stretching, varied by magnitude (high or low) and duration (long or short), leads to the best (1) improvement in the limitation in ROM; (2) restoration of the muscular and articular factors leading to contractures; and (3) prevention and treatment of contracture-associated histologic alterations of joint capsule and articular cartilage. Methods Using a rat animal model, the spinal cord was transected completely at the level of T8. The rats were randomly assigned to seven treatment groups (n = 4 per group), which were composed of static or intermittent stretching in combination with different amounts of applied torque magnitude and duration. We assessed the effect of stretching by measuring the ROM and evaluating the histologic alteration of the capsule and cartilage. Results Contractures improved in all treated groups except for the low-torque and short-duration static stretching conditions. High-torque stretching was effective against shortening of the synovial membrane and adhesions in the posterosuperior regions. Collagen Type II and VEGF in the cartilage were increased by stretching. Conclusions High-torque and long-duration static stretching led to greater restoration of ROM than the other torque and duration treatment groups. Stretching was more effective in improving articular components of contractures compared with the muscular components. Stretching in this rat model prevented shortening and adhesion of the joint capsule, and affected biochemical composition, but did not change morphologic features of the cartilage. Clinical Relevance This animal study tends to support the ideas that static stretching can influence joint ROM and histologic qualities of joint tissues, and that the way stretching is performed influences its efficacy. However, further studies are warranted to determine if our findings are clinically applicable.

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“…Não há aumento de fl exibilidade quando a duração do alongamento é aumentada de 30 a 60 segundos, ou quando a frequência de alongamento é aumentada de uma a três vezes por dia (18,23). Corroborando com outros estudos (13,14,18,22,23), optou-se pela realização de apenas uma única sessão de alongamento estático e sua sustentação por um período de 60 segundos, sendo observada sua efi cácia nos alongamentos.…”

Section: Discussionunclassified

“…Os exercícios de alongamento aumentam a extensibilidade dos tecidos moles e restauram o comprimento muscular por afetar as propriedades contráteis da fi bra muscular e pelas alterações viscoelásticas promovidas na unidade músculo-tendão (10)(11)(12)(13)(14)(15)(16)(17). O alongamento produz efeitos imediatos e uma única sessão em indivíduos saudáveis é capaz de melhorar a fl exibilidade muscular (amplitude máxima passiva fi siológica) e a mobilidade articular (10).…”

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Efeitos imediatos do alongamento em diferentes posicionamentos

Pinheiro

Góes

2010

Fisioter. mov.

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ResumoIntrodução: Exercícios de alongamento aumentam a extensibilidade dos tecidos moles e restauram o comprimento muscular. O alongamento produz efeitos imediatos e uma única sessão é capaz de melhorar a extensibilidade muscular e mobilidade articular. A técnica de alongamento e o posicionamento infl uenciam no nível de tensão muscular. Objetivo: O objetivo geral deste estudo foi determinar os efeitos imediatos do alongamento na fl exibilidade do músculo iliopsoas em diferentes posicionamentos, em uma única sessão, identifi cando máxima tensão desta musculatura e relacionando o alongamento com alterações comuns do alinhamento lombo-pélvico no plano sagital. Metodologia: Trata-se de um ensaio clínico controlado randomizado unicego. A população compreendeu estudantes com encurtamento do músculo iliopsoas. Foi realizada uma sessão de alongamento estático por um minuto com a extensão da articulação do quadril nos posicionamentos decúbito dorsal, semifl exão de joelhos, decúbito ventral e decúbito lateral. Para análise pareada das posições para o alongamento, foi utilizado o teste Wilcoxon (α ≤ 0,01). Resultados: Participaram do estudo 40 estudantes, divididos em grupos compostos por dez indivíduos. A média da idade foi de 22 ± 1,7 anos. A maioria dos participantes era do sexo feminino (77,5%) e 75% relataram episódio de dor lombar em alguma fase da vida. Observou-se, como efeitos imediatos do alongamento, um ganho na fl exibilidade muscular nos posicionamentos decúbito dorsal, semifl exão de joelhos e decúbito lateral. Observou-se também tendência à retroversão e neutralização da pelve. Conclusão: Os diferentes posicionamentos fornecem maior variabilidade de posições, permitindo ao fi sioterapeuta escolher qual a mais adequada para cada indivíduo.[

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Bouts of Passive Stretching after Immobilization of the Rat Soleus Muscle Increase Collagen Macromolecular Organization and Muscle Fiber Area

Cited by 48 publications

References 51 publications

Effects of GaAs laser and stretching on muscle contusion in rats

Effects of GaAs laser and stretching on muscle contusion in rats

Amount of Torque and Duration of Stretching Affects Correction of Knee Contracture in a Rat Model of Spinal Cord Injury

Efeitos imediatos do alongamento em diferentes posicionamentos

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