Hormônio do crescimento e exercício físico: considerações atuais

Cruzat, Vinícius Fernandes; Júnior, José Donato; Tirapegui, Júlio; Schneider, Cláudia Dornelles

doi:10.1590/s1516-93322008000400003

Cited by 23 publications

(28 citation statements)

References 87 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Adult individuals, when subjected to interventions for weight reduction usually have fat mass reduction with concomitant reduction of lean mass 23 , however, in adolescents, reducing body fat, arising interventions with moderate energy deficit, isn´t accompanied by a reduction in lean body mass 12 , probably because the adolescence be a highly anabolic phase due to the high concentration of circulating anabolic hormones such as growth hormone (GH). 24 In this intervention, it was observed that the control group also showed improvements in body shape after 12 weeks of aerobic training.…”

Section: Discussionmentioning

confidence: 86%

Aerobic Training in Obese Adolescents: A Multidisciplinary Approach

Gomes

Lofrano-Prado

Lira

et al. 2018

Rev Bras Med Esporte

View full text Add to dashboard Cite

Introduction: The prevalence of excess weight/obesity in adolescence has increased, and physical training may be effective in combating this scenario. Objective: To analyze the effect of different intensities of aerobic training on the body composition of obese adolescents undergoing multidisciplinary intervention. Methods: In this study, 107 pubertal (Tanner 3 and 4), obese (BMI=34.72±4.10 kg/m²) adolescents (14.85±1.44 years) were randomly assigned to three groups: high intensity training (HITG -ventilatory threshold I (VTI)); low intensity training (LITG -20% below the VTI) and control group (CG), without intervention. The adolescents in the HITG and LITG underwent nutritional and psychological (1x/week) and clinical (1 x/month) follow-up and physical training (3x/week) for 12 weeks. Results: Reductions in fat mass (FM) and body fat percentage (BFP) (p< 0.001) and an increase in fat-free mass (FFM) (p<0.001) were observed in all groups. There was a reduction in BMI only in the experimental groups (p<0.001). Conclusion: The effects of multidisciplinary treatment on the body composition of obese adolescents occur independently of the intensity of aerobic physical training. Level of Evidence I; High quality randomized clinical studies with or without statistically significant difference, but with narrow confidence intervals.

show abstract

Section: Discussionmentioning

confidence: 86%

Aerobic Training in Obese Adolescents: A Multidisciplinary Approach

Gomes

Lofrano-Prado

Lira

et al. 2018

Rev Bras Med Esporte

View full text Add to dashboard Cite

show abstract

“…In relation to a reduction in serum levels of GH in the SO group, a study [36] explains why athletes usually have lower GH release induced by exercise in sedentary or poorly trained individuals; Silva and Lengyel [37] in their studies, demonstrated that the synthesis of GH is also regulated by negative feedback. In other words, the high concentration of GH in circulation may lead to reduced stimulation of its synthesis in the adenohypophysis and/or reduced interaction with their receptors in body tissues, thus, attenuating its effects.…”

Section: Citationmentioning

confidence: 99%

Influence of Vascular Occlusion in Concentration of Growth Hormone and Lactate in Athletes during Strengthening Quadriceps Exercise

Leite¹,

Reis

Colnezi³

et al. 2015

Occup Med Health Aff

View full text Add to dashboard Cite

Objective: The aim of this comparative experimental study designed is analyze the possible changes in GH serum and lactate during the performance of resistance exercise-induced ischemia in young athletes. A possible outcome will be to promote greater strength gains and muscle hypertrophy during the training protocol.Design: This survey was conducted with 18 male football players 18 years of age. The athletes were divided into two groups; one group was subjected only to quadriceps exercises; the other group was subjected to quadriceps exercises associated with vascular occlusion. Levels of lactate and GH were observed before and after resistance exercise.Results: Comparing intergroup data, there were no statistically significant results. However, when comparing data within the groups, there was an increase in Group 2 obtained for both the lactate threshold and GH. Group 1 showed an increase in the lactate threshold, but a decrease in GH. Conclusions:This new method of resistance training should be analyzed, and further experiments are needed to optimize the protocol to reach optimum high intensity resistance training in young athletes.

show abstract

“…According to Cruzat et al, (2008), in skeletal muscle, GH has an anabolic effect on protein synthesis, and it is for this reason that physical activity and muscular strength training (ST) produce increased muscle mass, a process called "hypertrophy".…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2017

View full text Add to dashboard Cite

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).

show abstract

Hormônio do crescimento e exercício físico: considerações atuais

Cited by 23 publications

References 87 publications

Aerobic Training in Obese Adolescents: A Multidisciplinary Approach

Aerobic Training in Obese Adolescents: A Multidisciplinary Approach

Influence of Vascular Occlusion in Concentration of Growth Hormone and Lactate in Athletes during Strengthening Quadriceps Exercise

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

Contact Info

Product

Resources

About