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

Castoldi, Robson Chacon; Ozaki, Guilherme Akio Tamura; Giometti, Inês Cristina; Camargo, Regina Celi Trindade; Koike, Tatiana Emy; Garcia, Thiago Alves; Filho, José Carlos Silva Camargo; Belangero, William Dias

doi:10.4067/s0717-95022017000200015

Cited by 5 publications

(6 citation statements)

References 18 publications

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“…This difference in results can be explained by the difference in the predominance of muscle fiber types: the soleus muscle has a predominance of oxidative fibers, whereas the EDL has a predominance of glycolytic fibers; moreover, there is the interference of the biomechanics of movement, for while the soleus muscle is an ankle extensor, the EDL is a toe extender. In this way, the muscles adapted differently to the training, although both demonstrated greater hypertrophy than the animals that performed the aerobic training (Castoldi et al 2017b).…”

Section: Discussionmentioning

confidence: 99%

“…The muscle tissue was immersed in n-hexane solution and cooled in liquid nitrogen (-190 ºC), through the freezing method for unfixed tissues, and later stored in an ultra-low temperature freezer (-75 ºC) (Camargo Filho et al, 2011). The 5 mm sections were produced in a cryostat microtome at -20 °C, collected on slides and then stained with hematoxylin-eosin (HE) for immediate analysis of the minimum muscle cell diameter (Castoldi et al, 2017b).…”

Section: Critical Load Test For Determination Of Anaerobicmentioning

confidence: 99%

“…Interactive markers for the determination of muscle fiber cross-sections (AST) were carried out using NIS-Elements D3.0 2-SP7 -Nikon ® software. In total, 100 muscle fibers were measured on each slide (Castoldi et al 2017b).…”

Section: Critical Load Test For Determination Of Anaerobicmentioning

confidence: 99%

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Adaptations of Muscle Tissue of Rats Submitted to Aerobic and Anaerobic Physical Training in Different Ergometer Models

et al. 2018

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The objective of the present study was to analyze the effects of four different training models, two aerobic and two anaerobic models, in relation to muscular hypertrophy, by means of morphometric analysis of the muscle cells of the soleus muscle and the extensor digitorum longus muscle (EDL). The animals were divided into five groups, control (C), aerobic training in swimming (ATS), resistance training in water (RTW), aerobic training on a treadmill (ATT), and resistance training in climbing (RTC). The aerobic training was performed at 70 % of the anaerobic threshold for 30 minutes, while the RTW was composed of 3 series of 10 jumps, and the RTC 4 series of climbs, both at 80 % of the maximum load. All training protocols were performed for a total period of 4 weeks, 3 times per week. The diameters of the muscle cells were measured by means of histological slides of the EDL and soleus muscles. For the EDL muscle, there was no difference between the ATS and ATT aerobic training models (p = 0.20). However, the RTW presented greater hypertrophy when compared to the RTC (p <0.01). Regarding the soleus muscle, the ATS was responsible for generating greater hypertrophy than the ATT (p <0.01). In addition, the RTC was more efficient at producing hypertrophy than the RTW (p <0.01). In this way, it was concluded that exercise adaptation was according to exercise type, aerobic or anaerobic, and not to the modality used.

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Section: Discussionmentioning

confidence: 99%

Section: Critical Load Test For Determination Of Anaerobicmentioning

confidence: 99%

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Adaptations of Muscle Tissue of Rats Submitted to Aerobic and Anaerobic Physical Training in Different Ergometer Models

et al. 2018

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“…5,16,17 Several authors have demonstrated an increase in the cross-sectional area of muscle fibers from high-intensity, low-volume training. 5,7,18,19 The greater the intensity of the exercise, the greater the stimulus for hypertrophy, promoting greater stimulus to the protein synthesis of the contractile elements responsible for muscle contraction, generating an increase in the volume of muscle fiber. 5,6,17 The muscle hypertrophy process is modulated by the mechanical stimulus to which the muscle tissue is submitted, so an exercise with greater overload will promote greater stimulus for muscle hypertrophy.…”

Section: Discussionmentioning

confidence: 99%

Effect of Aerobic and Anaerobic Training on Different Ergometers in Rat Muscle and Heart Tissues

et al. 2022

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Objective Analyze the effects of aerobic and anaerobic training on different ergometers on muscle and cardiac hypertrophy in rats. Methods The animals were separated into the following groups: Control (C), Aerobic Training in Water (ATW), Resistance Training in Water (RTW), Aerobic Training on Treadmill (ATT), and Resistance Training in Climbing (RTC). All training protocols were carried out for 4 weeks, 3 times/week. The cross-sectional area (CSA) of the gastrocnemius muscle cells and the areas of the cardiomyocytes were measured. Results In the fast-twitch fibers, there was an increase in CSA in the RTW and RTC groups compared to the ATW (p<0.01 and p<0.01) and ATT groups (p<0.01 and p<0.01). In the slow-twitch fibers, the ATW and ATT groups demonstrated a lower CSA compared to the RTW (p=0.03 and p<0.00) and RTC groups (p<0.01 and p<0.01). In the cardiomyocytes, there was an increase in the area of the RTW and RTC groups compared to groups C (p<0.01; p<0.01), ATW (p=0.02; p<0.01), and ATT (p<0.01; p<0.01). Conclusion The anaerobic training effectively promotes hypertrophy in the fast-twitch fibers and the cardiomyocytes. Level of Evidence V; Animal experimental study.

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“…To evaluate the effect of physical activity, the animals were submitted to aquatic activity. They were initially submitted to the aquatic activity in a collective tank with 15 cm of depth for 10 minutes, so they could familiarize with the environment and try to remain on the surface (Castoldi et al, 2017). After waiting for 15 minutes, the animals started the aquatic activity in a 40 cm deep tank for 30 minutes, where a load was attached to their back, through vests (Aleixo et al, 2019).…”

Section: Methodsmentioning

confidence: 99%

Effects of Different Swimming Intensities on the Bone Properties of the Tibia and Femur of Wistar Rats in which Knee Rheumatoid Arthritis was Induced

et al. 2020

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Rheumatoid arthritis (RA) is a disease triggered by environmental and genetic factors. Research suggests that physical exercise has benefits such as delaying functional disability. In vivo studies using experimental models of arthritis can provide useful information about these benefits. to analyze the effects that different intensities of aquatic physical exercise have on the proprieties of the bones in induced arthritis in knees of Wistar rats. Male Wistar adults rats (n=20) were divided into 5 groups: Group Control Arthritis (GCA) n=4, Group control Placebo (GCP) n=4, Group Low Physical Activity (GB) n=4, Group Moderate Physical Activity (GM) n=4 and Group Intense Physical Activity (GI) n=4. The physical activity groups got an intra-articular injection of Zymosam on the right knee; the GCA received saline solution in the right knee; the GCP was submitted to the stress of the needle. The animals were submitted to aquatic activity for 30 minutes, 4 times a week for 5 weeks, and the intensity of the exercise was determined by a weight placed on their back: GB=1 %, GM=5 %, GI=15 % of their body weight. It was observed that the group GB, and the groups that did not exercise GCA and GCP, gained more weight compared to the group GM. In relation to the bone mineral content of the tibia, there was a decrease in the GM group when compared to the GCP group, whereas in the tibial bone mineral density there was a decrease in the GM group compared to the GCP, GCA, GB. As for the area of the femur, the GI group presented an increase of it compared to the GB and GM groups. It is concluded that the high intensity exercises promote better results in bone properties.

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

Cited by 5 publications

References 18 publications

Adaptations of Muscle Tissue of Rats Submitted to Aerobic and Anaerobic Physical Training in Different Ergometer Models

Adaptations of Muscle Tissue of Rats Submitted to Aerobic and Anaerobic Physical Training in Different Ergometer Models

Effect of Aerobic and Anaerobic Training on Different Ergometers in Rat Muscle and Heart Tissues

Effects of Different Swimming Intensities on the Bone Properties of the Tibia and Femur of Wistar Rats in which Knee Rheumatoid Arthritis was Induced

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