Análise morfológica do músculo gastrocnêmio medial de ratos submetidos a um protocolo de treinamento concorrente

Moret, Diego Grando; Castoldi, Robson Chacon; Araújo, Rafael Gavassa de; Spagnol, Alexandre Roveratti; Papoti, Marcelo; Filho, José Carlos Silva Camargo; Malheiro, Olga Cristina de Mello

doi:10.1590/s0101-32892013000300005

Cited by 5 publications

(9 citation statements)

References 20 publications

(17 reference statements)

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“…It is known that the use of water jumps can recover volume of muscle tissue lost after immobilization (Antunes et al, 2012). In addition to causing hypertrophy of muscle fibers (Moret et al, 2013), this activity acts systemically, increasing the mobilization of glucose, free fatty acids (FFA), and corticosterone to perform muscle contraction and reduce muscle glycogen, hepatic, and blood insulin concentrations (Rogato et al, 2003).…”

Section: Discussionmentioning

confidence: 99%

Morphometric Study of Muscle Fibers in Rats Submitted to Strength Training and Growth Hormone

et al. 2017

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SUMMARY:The aim of the present study was to observe the changes in the muscle tissue of rats after application of growth hormone (GH) and performing a strength training protocol (ST). In total, 40 male Wistar rats, 60 days old, were used, divided into four groups: control (C), control and application of GH (GHC), strength training (T), and strength training with the application of GH (GHT). The physical training protocol (PT) was composed of four series of 10 jumps in water, 3x/week, with an overload of 50 % of body weight for four weeks. GH was administered intraperitoneally at a dose of 0.2 IU/Kg to the GHC and GHT groups and saline (0.9 % sodium chloride) to the C and T groups. After four weeks of PT, the animals were euthanized and samples taken from the Soleus muscle. Histological sections were produced with a thickness of 5 mm and stained with hematoxylin-eosin (HE) and nicotinamide adenine dinucleotide tetrazolium reductase (NADH-TR). The markings for determining the measurement of the smallest diameter of muscle fibers (MF) were carried out using the software (AuxioVisionRel 4.8-Carl Zeiss ® and NIS-Elements D3.0-SP7-Nikon ® ). After obtaining the data, the Shapiro-Wilk test for normality was performed and then the nonparametric Kruskal-Wallis with Dunn post-test were used for analysis of MF and the Student t test for the analysis of intragroup body weights. All procedures adopted a 5 % significance value (p <0.05) and were performed using the software SPSS 22.0 for Windows ® . It was observed that both the GH and PT were able to generate increased diameter of MF (C:31.81±6.35; GHC:36.88±6.38; T:38.38± 6.94; GHT:36.89±7.16). Moreover, when analyzing the type, a significant increase was found only in the fast twitch MF (C:33.78±7.78; GHC:37.80±6.03; T:38.53±6.94; GHT:37.98±7.65) when compared to the slow twitch (C:25.93±6.66; GHC:26.95±8.03; T:26.24±6.90; GHT:27.20±5.77).

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Section: Discussionmentioning

confidence: 99%

Morphometric Study of Muscle Fibers in Rats Submitted to Strength Training and Growth Hormone

et al. 2017

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“…However, one of the major controversies regarding CT is the gain or decrease in muscular strength. While the creator of CT points to a decrease in physical capacity (Hickson, 1980), current findings show that, depending on the way it is used, it can be an effective way to increase performance (Castoldi et al, 2013;Machado et al, 2014). Furthermore, the effects of high-calorie diets have not been explored in conjunction with this type of training.…”

Section: Introductionmentioning

confidence: 87%

“…The muscle tissue was immersed in n-hexane cooled in liquid nitrogen by the not fixed tissue freezing method and then stored in a freezer at an ultra-low temperature (-80 º C) (Castoldi et al, 2015). Cuts of 5 µm were produced in a microtome cryostat at -20 °C, collected on slides and then stained with the hematoxylin-eosin (HE) and Toluidine Blue methods (Castoldi et al, 2013).…”

Section: Histological Processing Of the Striated Skeletal Musclementioning

confidence: 99%

“…According to Fleck & Kraemer (2006), strength exercises can result in changes in motor performance, muscular strength, body composition and, consequently, body aesthetics. Physical exercises are classified as aerobic or anaerobic, depending on their intensity and duration (Castoldi et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…Within a training program, aerobic resistance exercise and strength exercise may be associated, denominated concurrent physical training (CT) (Castoldi et al, 2013). There have been many questions about the effectiveness with respect to the influence of one on the other (Häkkinen et al, 2003;Laursen, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Effects of Concurrent Training on Muscle Fibers of Wistar Rats Submitted to Standard and Hypercaloric Diets

Castoldi¹,

Aleixo²,

Pereira³

et al. 2017

Int. J. Morphol.

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To analyze the effects of concurrent training (CT) on the muscle fibers of Wistar rats submitted to standard and hypercaloric diets. In total, 40 rats were used, divided into 4 groups: Sedentary Group (GS); Exercise Group (GE), Obese Sedentary Group (OS) and Obese Exercise Group (OE). The animals performed a CT protocol consisting of: muscle strength training and aerobic training, carried out 3 times a week for 45 days. The smallest diameter of muscle fibers (MDF) was analyzed to evaluate muscle hypertrophy. It was observed that the OE group presented a significant decrease in MDF, compared to the OS group (OE=77.41 µm vs. OS=98.58 µm). In addition, the animals that performed CT demonstrated muscle hypertrophy (GE=74.39 µm vs. GS=72.13 µm). In conclusion, the CT with a standard diet promoted an increase in MDF while CT with a hypercaloric diet resulted in a decrease.

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Effect of administration of high-protein diet in rats submitted to resistance training

et al. 2017

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Análise morfológica do músculo gastrocnêmio medial de ratos submetidos a um protocolo de treinamento concorrente

Cited by 5 publications

References 20 publications

Morphometric Study of Muscle Fibers in Rats Submitted to Strength Training and Growth Hormone

Morphometric Study of Muscle Fibers in Rats Submitted to Strength Training and Growth Hormone

Effects of Concurrent Training on Muscle Fibers of Wistar Rats Submitted to Standard and Hypercaloric Diets

Effect of administration of high-protein diet in rats submitted to resistance training

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