Aspectos neuroendócrinos e nutricionais em atletas com overtraining

Rogero, Marcelo Macedo; Mendes, Renata Rebello; Tirapegui, Júlio

doi:10.1590/s0004-27302005000300006

Cited by 25 publications

(17 citation statements)

References 40 publications

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“…From this view point, the IL-6 plays a more restoration than pro-inflammatory role. The IL-6 also stimulates the hypophysis gland to release the adrenocorticotrophic hormone (ACTH), which subsequently promotes the increase of the cortisol hormone release from the adrenal cortex (8)(9)(10) .…”

Section: Muscular Inflammation Induced By Exercisementioning

confidence: 99%

Aspectos atuais sobre estresse oxidativo, exercícios físicos e suplementação

Cruzat

Rogero

Borges

et al. 2007

Rev Bras Med Esporte

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Oxygen reactive species (ORE) are usually produced by the body metabolism. However, ORE present the ability to remove electrons from other cellular composites, being able to cause oxidative injuries in several molecules. Such fact leads to a total loss of cellular function. Physical exercise practice increases ORE synthesis, besides promoting muscular injury and inflammation. After a physical exercise set, the recovery phase begins, where several effects positive to health are observed, including increase in resistance to new injuries induced or not by exercise, a fact which is considered an 'adaptation' process. Many studies though, have reported that this recovery is not reached by individuals who are submitted to intense and extended exercises, or even, who have high training frequency. Nutritional alternatives have been widely studied, in order to reduce the effects promoted by extenuating exercise, among which vitamin E, vitamin C, creatine and glutamine supplementation is included. This review has the aim to approach the current aspects concerning the ORE formation, the cellular injury and inflammation processes, the adaptation to the kinds of aerobic and anaerobic exercise, besides possible nutritional interventions.

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Section: Muscular Inflammation Induced By Exercisementioning

confidence: 99%

Aspectos atuais sobre estresse oxidativo, exercícios físicos e suplementação

Cruzat

Rogero

Borges

et al. 2007

Rev Bras Med Esporte

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“…Significant difference was found in the muscular temperature gradient (temperature 24h after training -temperature before training) between the control and experimental groups. Studies report that the muscular injury caused by the physical exercise generally results from the practice of an unusual physical activity or a series of eccentric muscular actions 10,[44][45][46] , especially when the exercise is intense or of long duration 47 . These minute lacerations cause damage to the contractile components and consequently release of creatine-kinase in the blood stream 14,17,44 .…”

Section: Discussionmentioning

confidence: 99%

Pode a termografia auxiliar no diagnóstico de lesões musculares em atletas de futebol?

Bandeira

Moura

Souza

et al. 2012

Rev Bras Med Esporte

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Introduction: Since muscle injuries trigger inflammatory processes and inflammation generates heat due to increased local metabolism, hence the level of inflammation can be measured by the temperature gradient. Objective: To assess the feasibility of application of thermography in the diagnosis of injuries caused by physical training. Methods: The study was conducted with adolescent athletes of the Paraná Club, Curitiba, Brazil, who were divided into two groups, namely control and experimental. The control group attended a training session of low intensity and the experimental group a high intensity one. First, a thermographic image of the quadriceps of each athlete was acquired before the training session. After the training session, a blood sample was collected to check the level of serum lactate of each athlete. Subsequently, 24 hours after training, an extra blood sample was performed to check the level of serum CK of each athlete. Another individual thermographic image of the quadriceps was acquired at that stage. Results: The correlation between the lactate and CK was positive and statistically significant rho value = 0.661 (p = 0.038). There was no statistically significant correlation between CK values 24 h post-training and the change in temperature (24 h post-training -pre-training) in the muscles evaluated for the control group. There was a statistically significant difference in temperature (24 h post-training -pre-training) (p<0.05) for the three muscles studied only in the experimental group. Conclusion: The results of this study suggest the possibility of use of thermographic images, together with creatine kinase, in order to determine the intensity and location of post-training muscle damage, since the previously mentioned biochemical marker cannot determine the anatomic location of the muscle injury.

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“…Alguns trabalhos mostram diminuição das concentrações plasmática e tecidual durante e após exercício intenso e prolongado, devido ao aumento na concentração do cortisol, o qual estimula o efluxo de glutamina muscular e sua captação hepática, ou pelo aumento da concentração sanguínea de lactato, favorecendo maior captação da glutamina pelos rins 28 . Segundo Cruzat et al 27 , sua suplementação pode atenuar o estresse oxidativo, reduzir a quantidade de lesões celulares decorrentes de exercícios físicos exaustivos e melhorar a defesa imunológica.…”

Section: Glutaminaunclassified

Dietary supplement use by adolescents

Alves¹,

Lima²

2009

J Pediatr (Rio J)

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Objective: To review the use, benefits and adverse effects of the main dietary supplements consumed by adolescents. Sources:The literature review was performed using MEDLINE and LILACS databases (1997-2008). We analyzed 377 articles, and 52 of them were selected as references. Summary of the findings:Consumption of dietary supplements is widely spread among adolescents. This habit has often been detected in pediatric and adolescent medicine clinics. Most of the time, the use of supplements is motivated by the search of the "ideal body." Other reasons for this practice are: attempt to compensate for an inadequate diet, increase immunity, prevent diseases, improve athletic performance and overcome their own athletic limits. The dietary supplements most frequently used and for which there is little evidence of beneficial effects in healthy adolescents are: proteins, amino acids, beta-hydroxy-betamethylbutyrate, microelements, carnitine, creatine, vitamins, caffeine, and bicarbonate. This dietary supplementation may be beneficial for competitive athletes who do not have a balanced diet after a specific dietary deficiency has been detected. Conclusion:The unrestrained consumption of dietary supplements should be avoided, since, besides the lack of evidence that such practice will lead to improvement of performance, it exposes adolescents to several adverse effects. Balanced nutrition, with intake of essential energy and nutrients is usually enough to achieve good athletic performance. The use of dietary supplements must be allowed only for selected cases in which specific nutritional deficiencies are identified. J Pediatr (Rio J). 2009;85(4):287-294:Dietary supplements, exercise, sports, puberty. ResumoObjetivo: Revisar crititcamente o uso, benefícios e efeitos adversos dos principais suplementos alimentares utilizados por adolescentes. Fontes dos dados:A pesquisa bibliográfica, realizada nos últimos 10 anos, utilizou os bancos de dados MEDLINE e LILACS. Foram examinados 377 artigos, sendo selecionados 52. Síntese dos dados:O consumo de suplementos dietéticos é amplamente difundido entre adolescentes. Tal fato é constatado, com frequência, nos consultórios de pediatria e hebeatria. Na maioria das vezes ele ocorre sem uma necessidade específica, sendo motivado pela busca do corpo ideal. Outros motivos para essa suplementação são: compensar dieta inadequada, aumentar imunidade, prevenir doenças, melhorar o desempenho competitivo e superar os próprios limites. Os suplementos alimentares mais utilizados e discutidos nesse artigo e para os quais existem poucas evidências de um efeito benéfico de sua utilização por adolescentes saudáveis são: proteínas, aminoácidos, betahidroxibetametilbutirato, microelementos, carnitina, creatina, vitaminas, cafeína e bicarbonato.Conclusão: O uso irrestrito de suplementos dietéticos deve ser desaconselhado, uma vez que expõe o adolescente a vários efeitos adversos, além da falta de evidência de que tal prática levará a melhora no desempenho. Uma nutrição balanceada, com aquisição...

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Aspectos neuroendócrinos e nutricionais em atletas com overtraining

Cited by 25 publications

References 40 publications

Aspectos atuais sobre estresse oxidativo, exercícios físicos e suplementação

Aspectos atuais sobre estresse oxidativo, exercícios físicos e suplementação

Pode a termografia auxiliar no diagnóstico de lesões musculares em atletas de futebol?

Dietary supplement use by adolescents

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