Navegando por Palavras-chave "aminoácidos"

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    Consumo de suplementos por alunos de academias de ginástica em São Paulo
    (Pontifícia Universidade Católica de Campinas, 2003-09-01) Pereira, Raquel Franzini; Lajolo, Franco Maria; Hirschbruch, Marcia Daskal [UNIFESP]; Universidade de São Paulo (USP); Universidade Federal de São Paulo (UNIFESP)
    The increase in the number of fitness centers in the city of São Paulo, together with the increase in the offering of different supplements, has raised interest in the study of the consumption of supplements among fitness center users. The consumption of supplements by the general public has not been well quantified yet, and little information has been published about this subject. The arrival of new supplements in the market place has been faster than the creation of regulations and the accomplishment of researches proving their effects and determining the safety for their long-term use. In a sample of 309 users from seven fitness centers in São Paulo in 1999, 74 (23.9%) used at least one type of supplement, 77,0% of whom were male and 23,0% were female. The most consumed supplements were amino acids or other proteic products (38.9%), and the daily intake was the most mentioned consumption frequency (90.3%). The correlation between money expenditure with supplement and individual income was 27.5% (p = 0.0483; n = 52), and the expenses were greater among men; the correlation with family income was 36.1% (p = 0.0137; n = 46) and with Body Mass Index it was to 17.1% (p = 0.1564; n = 70). The conclusion was that the consumption of supplements is significant in the evaluated group, showing the need for more studies about the consumption of these products and their effects, focusing on nutrition education approaches in order to increase the level of information about them and to guarantee the safety of their use.
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    Suplementação proteica não aumenta a concentração plasmática de óxido nítrico em homens saudáveis
    (Sociedade Brasileira de Medicina do Exercício e do Esporte, 2009-04-01) Moraes, Milton Rocha [UNIFESP]; Aoki, Marcelo Saldanha; Araújo, Ronaldo de Carvalho [UNIFESP]; Higa, Elisa Mieko Suemitsu [UNIFESP]; Mouro, Margaret Gori [UNIFESP]; Bacurau, Reury Frank Pereira; UMC Faculdade de Educação Física Laboratório de Aptidão Física; Universidade Federal de São Paulo (UNIFESP); Universidade de São Paulo (USP)
    Nutritional supplements, theoretically able to increase endogenous nitric oxide (NO) production have experienced great popularity among physically active individuals. AIM: scientific evidence available regarding this issue is scarce. Therefore, the purpose of this study was to evaluate the effect of a dietary supplement commercialized as a nitric oxide booster. MATERIALS AND METHODS: twelve sedentary men with no risk factors for cardiovascular diseases were supplemented with placebo or protein in two different occasions. The present study was conducted in a cross double-blind design. In order to assess plasmatic NO concentration, blood samples were obtained before (24hs and immediately before) and after (30 and 60 minutes) consumption of placebo (PLA) or protein supplement (SP). RESULTS: there was no difference in plasmatic nitric oxide concentration between both trails (Post-supplementation 30 min - PLA: 19.3±4.7 µmol.L-1 vs. SP: 18.9±4.4 µmol.L-1 and Post-supplementation 60 min - PLA: 21.3±6.5 µmol.L-1 vs. SP: 20.3±4.9 µmol.L-1). In addition, no difference was detected for arterial blood pressure. CONCLUSION: the dietary supplement analyzed in the present study failed to increase nitric oxide endogenous production.