Resumo Potência muscular é o produto entre força e velocidade, que se traduz na capacidade de produzir força em um curto intervalo de tempo. Avaliações periódicas de força e potência, combinadas a estratégias de treinamento para essas capacidades, são de grande valor para atletas e treinadores multi-esportivos, pois são determinantes para o sucesso da equipe. Especificamente no rugby, onde o passe é elemento predominante e determinante do sucesso esportivo, poucos testes de campo estão disponíveis para avaliar força muscular de membro superior. O objetivo deste ponto de vista é corrigir a equação de predição de potência do membro superior previamente publicada pelo nosso grupo e destacar seus conceitos e aplicabilidade nos esportes, especialmente no rugby.

Abstract Muscle power is the product of muscle force and velocity, which translates into the ability to produce force in a short time interval. Periodic evaluations of strength and power, coupled with training strategies for these capacities, are of great value to athletes and multi-sports coaches, since they are key determinants for team success. Specifically, in rugby, where passing is a predominant and determinant element of sporting success, few field tests are available for assessing upper limb muscle power. The purpose of this point of view is to correct the upper limb power prediction equation previously published by our group and to highlight its concepts and applicability in sports, especially in rugby.

Abstract With the advent of the antiretroviral therapy (ART), people infected with HIV are experiencing a significant increase in life expectancy. However, as this population ages, the morbidity and mortality due to events not related to HIV infection and/or treatment become increasingly clear. Cardiovascular diseases are among the major causes of death, and, thus, understanding the factors that trigger this situation is necessary. This review article will assess how the intrinsic and extrinsic factors related to HIV, ART and the associated risk factors can aid the epidemiological transition of mortality in this population. Moreover, we will present the studies on the epidemiology and pathogenesis of each clinical condition related to HIV-infected individuals, in addition to introducing the major markers of cardiovascular disease in this population. Finally, we will point the main issues to be addressed by health professionals for an adequate prognosis.

Abstract Aims: To investigate the effect of 12 weeks of intradialytic aerobic training on serum levels of interleukin-1β, interleukin-6, interleukin-8, interleukin-10, tumor necrosis factor alpha and functional capacity. Methods: Thirty sedentary volunteers were randomly assigned to either to exercise or control group. Exercise group were submitted to 12 weeks of aerobic training performed on a cycle ergometer for 30 minutes at intensity rated using the Borg scale (6 to 7) three times a week while control group kept the daily habits. Results: After 12 weeks only exercise group presented a significant reduction of serum levels of interleukin-1β, interleukin-6, interleukin-8, tumor necrosis factor alpha and an increase in serum levels of interleukin-10 and functional capacity. Conclusion: Twelve weeks of intradialytic aerobic training was effective in controlling inflammation and improving the functional ability of patients with chronic kidney disease.

ABSTRACT Aims This study promoted a screening of the geographical distribution and scientific production of the Brazilian research groups on interventions with diet and/or exercise in cancer. Methods A systematic search on the current basis of the Directory of Research Groups of the National Council for Scientific and Technological Development was done to collect information such as name of group; name of leader; unit of federation; institution; year of creation; number of researchers, students and technicians; and the group's knowledge sub-area. All leaders' curricula were accessed to screen their general publications on cancer and their specific publications on nutrition, exercise and cancer. The publications were classified according to the QUALIS (2015) criteria of the Coordination of Improvement of Higher Education Personnel in the Physical Education area. Results The Southeast has the highest number of active groups, but the North has no registered groups. The Midwest concentrates the largest number of members in its research groups and the largest overall scientific production on cancer, but the Southeast presents the largest specific production on nutrition, physical exercise and cancer. Most of the specific publications were B2. Conclusion Research groups and scientific contributions involving this knowledge field need to be encouraged and better distributed geographically throughout the Brazilian territory.

Resumo Objetivou-se verificar a concordância e predição da potência muscular de membros superiores (PMS) a partir da distância do teste de Arremesso de Medicine Ball (AMB) em jogadores de rugby. Participaram do estudo 18 jogadores amadores de rugby (11 homens) os quais realizaram o teste AMB e o exercício de supino reto na barra guiada com acelerômetro Myotest® nas intensidades de 30%, 40%, 50% e 60% de 1RM. A regressão linear foi utilizada para derivar a equação de predição da potência a partir da distância no AMB. A análise de resíduo estimou o erro residual dos valores preditos, utilizando os valores obtidos pelo Myotest® como referência. O método leave-one-out foi adotado para aferir o erro da equação em subconjuntos da amostra. O modelo de Bland-Altman verificou a concordância entre potência predita pelo AMB e valores obtidos do Myotest® de forma absoluta Watts (W) e relativa à massa isenta de gordura (W/kg). Foram encontradas correlações significativas entre os métodos (r=0,834, 0872 e 0,854) para as intensidades de 30%, 40% e 50% de 1RM, respectivamente. O viés de medida na análise absoluta foi de -1,87 W (p<0,05). Na análise relativa, foi verificado o viés de 0,782 W/kg (p<0,05). Pode-se concluir que o teste de AMB possui alta concordância com os valores reais da PMS e também verificou-se que a equação elaborada no estudo possui alta acurácia para predizer a PMS em jogadores de rugby de ambos os sexos.

Abstract The aim of this study was to develop an upper limb muscle power (PUL) prediction model using the Medicine Ball Throw Test (MBT) in rugby players. Eighteen amateur rugby players underwent the MBT test and the guided bench press exercise at 30, 40, 50 and 60% of 1. Myotest® accelerometer was positioned on the bench press bar to estimate muscle power. Linear regression was used to derive the upper limb muscle power prediction equation from the MBT distance. The residue analysis estimated the residual error of the predicted values using values obtained by Myotest®. Bland-Altman plots were used to verify agreement between actual and predicted upper limb muscle power, both in absolute Watts (W) and relative terms (W/kg of fat-free mass). There were significant correlations between actual and predicted upper limb muscle power (r = 0.834, 0.854, and 0.872) for intensities of 30%, 40% and 50%, respectively. Absolute bias of predicted values was -1.87 W (p <0.05). For muscle power predicted relative to fat-free mass, bias was 0.782 W/kg (p <0.05). Conclusion: The MBT test has high correlation with actual PUL values and it was found that the equation developed in this study has high accuracy to predict PUL in rugby players of both sexes.

INTRODUÇÃO: O sistema cardiovascular sofre sobrecarga durante a prática de exercícios físicos. Entretanto, pouco se sabe sobre a resposta cardíaca em diferentes intervalos de recuperação (IR). OBJETIVO: O presente estudo teve como objetivo analisar a sobrecarga cardíaca, utilizando como parâmetro cardiovascular a frequência cardíaca (FC), pressão arterial sistólica (PAS) e duplo-produto (DP) em IR distintos (IR), sendo delimitados em 45'' (IR45''), 60'' (IR60'') e 90'' (IR90''). MÉTODOS: O estudo analisou 10 voluntários do gênero masculino, com idade 21,5 ± 6,04 anos, peso 77,5 ± 10,62 kg e altura 179 ± 7 cm, que foram submetidos a um protocolo de três séries de 12 repetições à 60% de uma repetição máxima (1RM) no aparelho leg press 45º. O teste de Wilcoxon foi utilizado para comparar as variáveis hemodinâmicas tendo nível de significância quando p ≤ 0,05. RESULTADOS: Houve diferença significativa de todas as variáveis quando compara-se o estado pré-esforço com as séries subsequentes. A PAS apresentou diferença entre a primeira e as demais séries. Foi observada diferença entre a segunda e terceira série com IR45'', além de na terceira série o IR45'' apresentar maiores valores quando comparados ao IR90''. De forma semelhante, a FC apresentou diferença entre a primeira e todas as séries, em todos os IR. Os IR45'' e IR60'' apresentaram diferença entre a segunda e terceira séries. Contudo, o DP demonstrou diferença entre a primeira e todas as séries em todos os IR, além de IR45'' e IR60'' apresentar diferença entre a segunda e terceira série. CONCLUSÃO: De acordo com os resultados encontrados, conclui-se que a PAS e FC é sensível ao número de séries intrasséries, porém, não houve diferença quando se compara os IR entre si. Contudo, há maior tendência do IR45'' causar aumento da sobrecarga cardíaca, principalmente pelo aumento da PAS.

INTRODUCTION: The cardiovascular system is the most submitted to overload during exercise practice. However, there is a lack of knowledge about heart response under different recovery intervals (RI). OBJECTIVE: The purpose of this study was to analyse the heart overload, using as cardiovascular parameter, the heart rate (HR), sistolic blood pressure (SBP) and double product (DP) under different recovery intervals (RI), delimited in 45'' (RI45''), 60'' (RI60'') and 90'' (RI90'') seconds. METHODS: The study analysed 10 volunteers, age 21.5 ± 6.04 years, weight 77.5 ± 10.62 kg and height 179 ± 7 cm, that was submitted a protocol of three sets of 12 repetition of 60% 1RM in Leg Press 45º apparatus. The Wilcoxon test was used to compare hemodynamic variables with significance level when p ≤ 0.05. RESULTS: There were significant differences of all variables when compared to pre-state effort with subsequent sets. The SBP was different between the first and the other sets. Also been observed difference between the second and third sets with RI45'', and in the third set, the RI45'' present greater values when compared to RI90''. Similarly, the HR present difference between the first and all other sets in all RI. The RI45'' and RI60'' showed differences between the second and third sets. However, the DP has demonstrated difference between the first and all others sets in all RI, and, the RI45'' and RI60'' showed difference between the second and third sets. CONCLUSION: According to the results, it is concluded that the SBP and HR is sensitive to the number of sets intra-sets, but there was no difference when comparing the RI with each other. However, there is a greater tendency of RI45'' cause increased cardiac overload, primarily by increased in SBP.