A natação minimiza o retardo no crescimento somático e ósseo de ratos?

Esteves, Ana Cristina; Bizarria, Fabiana Soares; Coutinho, Marcos Paulo Galdino; Barreto, Tâmara Kelly Delgado Paes; Brasileiro-Santos, Maria do Socorro; Moraes, Sílvia Regina Arruda de

doi:10.1590/s1517-86922010000500010

Cited by 4 publications

(5 citation statements)

References 23 publications

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“…Greater weight gain was observed in the group of oophorectomized rats, which corroborates similar studies, and the castrated rat is also a model for inducing obesity. 5 , 7 , 10 , 15 …”

Section: Resultsmentioning

confidence: 99%

“…It was ensured that all animals had contact with water to prevent the results being caused by aquatic stress. 15 The rats were weighed once a week.…”

Section: Methodsmentioning

confidence: 99%

“…Although aquatic exercises exert muscle strains, 7 , 10 , 11 , 15 they do not promote the same impact that resistance exercises do, which leads to low injury rates 11 and, therefore, they are considered as safe. Nevertheless, few studies have been conducted on the contribution of swimming for the treatment of osteoporosis.…”

Section: Introductionmentioning

confidence: 99%

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Biochemical Analysis and Bone Remodeling in Response to Oophorectomy and Aquatic Training

et al. 2016

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Objective:To investigate whether swimming could prevent bone loss and could be indicated to assist in treatment of osteoporosis. Methods:Female rats were divided into 4 groups (n=6), two of them were oophorectomized. Animals from two groups, one oophorectomized and another not oophorectomized, underwent aquatic training for eight weeks. After training, the animals were sacrificed and their blood was collected for calcium and alkaline phosphatase serum dosage; the femur was removed and subjected to radiological and histological densitometry analysis to assess bone loss and osteoclast counting on femoral head and neck. Results:Increase in serum calcium was not observed. There was an increasing activity of alkaline phosphatase in the oophorectomized groups. The radiographs suggest that there was a greater bone mass density in the trained groups. Concerning histology, the trained groups had better tissue structural organization than the sedentary groups. In the oophorectomized and sedentary group, higher presence of osteoclasts was observed a. Conclusion:Exercise and oophorectomy did not promote changes in serum calcium levels. The decrease of sex steroids caused by oophorectomy was responsible for severe bone loss, but swimming exercise was able to reduce this loss. Oophorectomy promoted the proliferation of osteoclasts and the exercise proved to be able to diminish it. Level of Evidence I, Experimental Study.

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“…Greater weight gain was observed in the group of oophorectomized rats, which corroborates similar studies, and the castrated rat is also a model for inducing obesity. 5 , 7 , 10 , 15 …”

Section: Resultsmentioning

confidence: 99%

“…It was ensured that all animals had contact with water to prevent the results being caused by aquatic stress. 15 The rats were weighed once a week.…”

Section: Methodsmentioning

confidence: 99%

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Biochemical Analysis and Bone Remodeling in Response to Oophorectomy and Aquatic Training

et al. 2016

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“…Sabe-se que a carga mecânica influencia no desenvolvimento e manutenção de tecidos articulares, incluindo a cartilagem 5 . A carga mecânica também é um importante estímulo para o remodelamento ósseo, induzindo a uma melhor fixação de cálcio 6 .…”

Section: Abstract | Objectiveunclassified

Diferentes Respostas Do Tecido Ósseo E Articular De Ratos Wistar, Submetidos a Exercício Resistido, Após Lesão Nervosa

Baretta¹,

Pelissari²,

Escher³

et al. 2017

RPF

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RESUMO | Objetivo:analisar o efeito do exercício resistido de subida em escadas nos tecidos ósseo e articular, após lesão compressiva do nervo isquiático de ratos Wistar. Material e Métodos: 32 ratos foram divididos aleatoriamente em 4 grupos, com 8 animais em cada, G1 (controle), G2 (exercício), G3 (lesão) e G4 (lesão e exercício). Após a lesão nervosa G2 e G4 foram submetidos ao exercício resistido de subida em escada, durante 5 dias na semana, com intervalo de 2 dias, por 21 dias. Os animais foram eutanasiados e as articulações do joelho e tíbias do membro pélvico lesionado foram coletadas, e seguiram o processamento padrão para análises em microscopia de luz. Resultados: O tecido ósseo apresentou alterações significativas, em relação a análise morfométrica da área do canal medular e contagem e osteócitos, porém, não foi observada diferença significativa em relação a análise da espessura do osso cortical. Na cartilagem articular do joelho foram observadas discretas alterações morfológicas entre os grupos, como a presença de clones celulares no grupo G3 e remodelagem no grupo G4. Conclusão: a lesão do nervo isquiático em ratos Wistar trouxe efeitos deletérios ao tecido ósseo e articular. Também foi observado que o exercício físico resistido em subida de escada não trouxe alterações ao tecido ósseo dos animais, porém, foi eficaz ao retorno às características normais da cartilagem articular lesionada, e demonstrou aumento da evidencia da tidemark, em animais não lesionados. ABSTRACT | Objective:To analyze the effect of resistance exercise climb stairs in bone tissue and articular after compression injury of the sciatic nerve of Wistar rats. Methods: 32 rats were randomly divided into 4 groups with 8 animals in each, G1 (control), G2 (exercise), G3 (injury) and G4 (injury and exercise). After nerve injury G2 and G4 were submitted to resistance exercise climb stairs, for 5 days a week, with two days interval for 21 days. After the experiment, the animals were euthanized and the knee and tibia of the injured hindlimb were collected, and followed the standard processing for analysis by light microscopy. Results: The bone tissue change significantly in relation to morphometric analysis of the area of the spinal canal and counting and osteocytes, however, was not observed significant difference in the analysis of the thickness of the cortical bone. A joint tissue were observed discrete morphological changes between the groups. Conclusion: The sciatic nerve injury in rats brought deleterious effects on bone tissue and articular. It was also observed that resistance exercise in stair climbing brought no changes to bone tissue of animals, however, it was effective to return to the normal characteristics of the injured joint, and showed increased evidence of tidemark in uninjured animals.

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“…3 When in disuse, due to lack of weight bearing or of physical activity, a decrease in the necessary stimulus occurs for bone growth and remodeling, which may result in osteopenia and increase the possibility of fractures. 4 Immobilization is often used in the treatment of orthopedic disorders, common in cases of sprains, ruptures of ligaments and tendons, muscle, joint and fracture injuries, helping to reduce pain, promoting the alignment of structures and enhancing the quality of life. However, the immobilization of limb precludes movement, which may affect bone and muscle composition 5,6 There are also situations of immobilization due to inactivity or lack of tension stimuli such as bedridden patients and even astronauts in space missions exposed to microgravity, in which a metabolic imbalance occurs in the bone, generating a decrease in the bone mass and its functionality, 7,8 thus making the bone susceptible to new lesions, such as recurrent fractures, which frequently appear, generating a need for effective rehabilitation protocols for these individuals to restore their functional capacity and quality of life.…”

Section: Introductionmentioning

confidence: 99%

Vibratory Platform in the Tibial Bone Tissue of Wistar Rats Subjected to Immobilization

Silva¹,

Wutzke²,

Neves³

et al. 2021

JMS

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Introduction: immobilization is a common option for the treatment of orthopaedic disorders, such as sprains, ligament ruptures, muscle, joint and fracture injuries. But in addition to the beneficial effects, immobilization leads to movement restriction, which can affect bone and muscle composition. Several therapeutic measures have served to remobilization, in this sense, the vibratory platform is an equipment that can provide interesting results in remobilization. Thus, the present study was intended to evaluate the vibratory platform action in the tibial bone tissue of Wistar rats submitted to immobilization. The experimental model used 24 Wistar rats randomly divided into 4 experimental groups: G1 (control group), G2 (immobilized only), G3 (immobilization and free remobilization) and G4 (immobilization and remobilization with vibratory platform). Immobilization caused a reduction in the total area of immobilized bone, but did not produce differences in the area of the spinal canal. For the cortical bone thickness, all the immobilized groups presented a reduction compared to the control, but the group that had the treatment with the vibratory platform resembled the only group immobilized (G2). In the number of osteocytes, there was increase in G3 and G4 when compared to G1 and G2. The protocol of whole body vibration used in this study induced recovery of the cortical bone thickness, with no advantages for the other variables in relation to the free remobilization group.

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A natação minimiza o retardo no crescimento somático e ósseo de ratos?

Cited by 4 publications

References 23 publications

Biochemical Analysis and Bone Remodeling in Response to Oophorectomy and Aquatic Training

Biochemical Analysis and Bone Remodeling in Response to Oophorectomy and Aquatic Training

Diferentes Respostas Do Tecido Ósseo E Articular De Ratos Wistar, Submetidos a Exercício Resistido, Após Lesão Nervosa

Vibratory Platform in the Tibial Bone Tissue of Wistar Rats Subjected to Immobilization

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