Effects of Resistance Training and Soy Isoflavone on Body Composition in Postmenopausal Women

Objective. To investigate the independent and additive effects of resistance training (RT) and soy isoflavone (ISO) on body composition in postmenopausal women (PW). Method. This study used a placebo-controlled, double-blind (soy), randomized (ISO versus placebo) × (RT versus No RT) design. A total of 80 PW, aged 45–70 years, were randomly (71 completed 9-months intervention): RT + ISO (n = 15), No RT + ISO (n = 20), RT + placebo (n = 18), and No RT + placebo (n = 18). ISO received 100 mg a day of isoflavone; and to RT attended supervised resistance training sessions. At baseline and 9-months, fat and muscle mass were estimated by DXA. ANOVA and test t were used. Results. RT groups showed significantly increased muscle strength (35.2%) and muscle mass (1.4%). Exercising attenuated gains in fat trunk and % body fat (P < .05). Significant decreases in muscle mass (−1.8%) and increases in fat mass of the whole-body (1.6%) and trunk (9.7%) was found in no-RT groups (P < .05). In ISO groups, there were no differences in body composition and muscle strength. ISO and RT had no additive effects. Conclusion. In PW: RT improved muscle mass and strength and attenuated gain of fat mass; ISO did not alter body composition and muscle strength; there were no additive effects of RT and ISO

Clinical Study Effects of Resistance Training and Soy Isoflavone on Body Composition in Postmenopausal Women

Objective. To investigate the independent and additive effects of resistance training (RT) and soy isoflavone (ISO) on body composition in postmenopausal women (PW). Method. This study used a placebo-controlled, double-blind (soy), randomized (ISO versus placebo) × (RT versus No RT) design. A total of 80 PW, aged 45-70 years, were randomly (71 completed 9-months intervention): RT + ISO (n = 15), No RT + ISO (n = 20), RT + placebo (n = 18), and No RT + placebo (n = 18). ISO received 100 mg a day of isoflavone; and to RT attended supervised resistance training sessions. At baseline and 9-months, fat and muscle mass were estimated by DXA. ANOVA and test t were used. Results. RT groups showed significantly increased muscle strength (35.2%) and muscle mass (1.4%). Exercising attenuated gains in fat trunk and % body fat (P &lt; .05). Significant decreases in muscle mass (−1.8%) and increases in fat mass of the whole-body (1.6%) and trunk (9.7%) was found in no-RT groups (P &lt; .05). In ISO groups, there were no differences in body composition and muscle strength. ISO and RT had no additive effects. Conclusion. In PW: RT improved muscle mass and strength and attenuated gain of fat mass; ISO did not alter body composition and muscle strength; there were no additive effects of RT and ISO

Comparison of Predictive Equations for Resting Energy Expenditure in Overweight and Obese Adults

Objective. To compare values from predictive equations of resting energy expenditure (REE) with indirect calorimetry (IC) in overweight and obese adults. Methods. Eighty-two participants aged 30 to 60 years old were retrospectively analyzed. The persons had a body mass index ≥25 kg/m2. REE was estimated by IC and other five equations of the literature (Harris and Benedict, WHO1, WHO2, Owen, Mifflin). Results. All equations had different values when compared to those of IC. The best values were found by Harris and Benedict, WHO1, and WHO2, with high values of intraclass correlation coefficient and low values of mean difference. Furthermore, WHO1 and WHO2 showed lower systematic error and random. Conclusion. No predictive equations had the same values of REE as compared to those of indirect calorimetry, and those which least underestimated REE were the equations of WHO1, WHO2, and Harris and Benedict. The next step would be to validate the new equation proposed

O Short Physical Performance Battery é uma ferramenta discriminativa para identificar baixa qualidade de vida em mulheres na pós-menopausa sobreviventes do câncer ginecológico

Adverse events due to cancer treatment (changes in weight, reduced muscle capacity and mobility) hinder the quality of life (QoL) of cancer survivors. Nevertheless, the identification of discriminative predictors of QoL in post-menopausal women (PW) survivors of gynecological cancer (PW-SGC) has been ignored. Objective: The purpose of the present study was to examine the role of muscle capacity, mobility and body mass index (BMI) on the deterioration of QoL in PW (n = 35; 62.1 ± 8.2 years) and PW-SGC (n = 51; 60.8 ± 11.4 years). Methods: The QoL questionnaire (SF-36), anthropometrical evaluation (BMI), hand-held dynamometry (HHD) and short physical performance battery (SPPB) were applied in all volunteers. Results: The participants had overweight, low SF-36 scores and normal HHD, and no significant differences were found between both groups, however the SPPB score was higher in the PW group (p &lt; 0.001). Linear regression analyses for QoL indicated the BMI (beta = -0.27) and the SPPB (beta = 0.57) were the strongest and most significant predictors in PW and PW-SGC, respectively. The area under the curve (AUC) for the SPPB score was 0.74 (95% CI: 0.57-0.87; P = 0.015) in the PW-SGC group and 0.62 (95% CI: 0.47-0.75; P = 0.181) in PW. Conclusion: The present study showed that the importance of BMI and mobility (SPPB) for QoL differ between PW and PW-SGC. For PW-SGC, the strongest independent predictor of QoL was mobility (SPPB), whereas BMI was the strongest contributor in PW. Moreover, the SPPB test is a discriminative predictor (or assessment tool) for identifying the low quality of life in postmenopausal women survivors of gynecological cancer.Efeitos adversos do tratamento (modificações da massa corporal e reduções da capacidade muscular e mobilidade) podem modificar a qualidade de vida (QV) de sobreviventes de câncer. Semelhantemente, a menopausa e o envelhecimento podem promover alterações antropométricas e da função física. Portanto, torna-se necessário o levantamento de ferramentas para predizer, distintamente, a QV em mulheres na pós menopausa (PM) e em mulheres na pós menopausa sobreviventes de câncer ginecológico (PMSCG). Objetivo: Examinar a contribuição da força, mobilidade e do índice de massa corporal (IMC) sobre as alterações da QV em PM (n = 35; 62,1±8,2 anos) e PMSCG (n = 51; 60,8±11,4 anos). Métodos: Aplicou-se questionário de QV (SF-36), avaliação antropométrica (IMC), dinamometria de preensão manual (DPM) e short physical performance battery (SPPB). Resultados: Participantes apresentaram sobrepeso, baixo score em SF-36 e DPM normal, sem diferenças entre os grupos. O score de SPPB foi maior em PM (p&lt;0,001). Análise de regressão linear de QV, indicou IMC (beta = -0,27) e o SPPB (beta = 0,57), como os mais fortes preditores em PM e PMSCG, respectivamente. A área sob a curva para o score do SPPB foi 0,74 (95% CI: 0,57-0.87; P = 0,015) em PMSCG e 0,62 (95% CI: 0,47-0,75; P = 0,181) em PM. Conclusão: O presente estudo demonstrou que para PMSCG o principal preditor da QV foi a mobilidade (SPPB), enquanto o IMC foi o mais forte contribuidor em PM. Portanto, o SPPB é um teste específico para identificar reduções na QV pacientes sobreviventes de câncer ginecológico

Análise da correlação entre o protocolo Polar Fitness Test® para predição de VO2máx e ergoespirometria

Introduction: The importance of maximal oxygen consumption ( O 2max ) measurement is justified by its inter - national acceptance as the best physiological parameter to assess the functional capacity of the cardiorespiratory system in both athletes and non-athletes who physically train in order to achieve better health. Objective: To deter - mine the agreement between the Polar Fitness Test ® protocols to estimate of O 2max and the maximal exercise test with direct gas measurement. Methods: Seventeen active males (22.5 ± 2 years) participated in the study. At rest, the Polar Fitness Test ® protocol by direct gas collection under maximum effort on treadmill and the Bruce protocol were applied. Results: Significant difference in the O 2max estimation was observed between methods. The Polar Fitness Test ® protocol underestimated O 2max a mean of 15% (CI 95% : 24;-53%) when compared to the direct protocol. The values obtained by the Polar Fitness Test ® did not correlate well with direct measurement in ergospirometer (r = 0.1). Conclusion: The Polar Fitness Test ® protocol is not valid to estimate O 2max in physically active young men.INTRODUÇÃO: A importância da mensuração do consumo máximo de oxigênio (O2máx)é justificada por sua aceitação internacional como o melhor parâmetro fisiológico para avaliar a capacidade funcional do sistema cardiorrespiratório tanto em atletas como em não atletas que treinam fisicamente com objetivo de obter melhor saúde. OBJETIVO: Verificar a concordância entre os protocolos Polar Fitness Test® para a estimativa do O2máx e o teste de esforço máximo com medida direta de gases. MÉTODOS: Dezessete homens ativos (22,5 ± dois anos) participaram. Em repouso, aplicou-se o protocolo Polar Fitness Test® e, em seguida, a coleta direta de gases sob o esforço máximo, em esteira, seguindo o protocolo de Bruce. RESULTADOS: Houve diferença significativa entre os valores médios dos métodos para estimativa do O2máx. O protocolo Polar Fitness Test® subestimou o O2máx, em média 15% (IC95%: 24; –53%) comparado com a medida direta de gases. Os valores obtidos pelo Polar Fitness Test® não tiveram boa correlação com a medida direta em ergoespirômetro (r = 0,1). CONCLUSÃO: O protocolo Polar Fitness Test® não é válido para a estimativa do O2máx em homens jovens ativos fisicamente

Influence of sex on cytokines, heat shock protein and oxidative stress markers in response to an acute total body resistance exercise protocol

Background/Objective: This study evaluated the influence of sex on changes in cytokines, heat shock proteins (HSPs), and oxidative stress in response to a single bout of total body resistance exercise. Methods: Sixteen healthy volunteers (8 men and 8 women), active and recreationally trained in resistance exercise, were subjected to a single bout of total body resistance exercise (3 × 8–10 repetition maximum, 10 exercises, rests periods of 90–120 seconds). Serum creatine kinase (CK), interleukin (IL)-6, IL-10, tumor necrosis factor-α, HSP60, HSP70, thiobarbituric acid reactive substance, and reduced glutathione were assessed at pre-protocol, and 1 hour, 4 hours, and 24 hours post-protocol. Results: Both men and women had a similar increase in CK (p < 0.05) activity at 24 hours post-exercise. Significant sex differences were observed for IL-6. In the men, an increase from baseline was noted at 1 hour for IL-6. In women, an increase from baseline was noted at 4 hours only for IL-6. There was a significant correlation between peak IL-6 blood level and CK level at 24 hours only in the women. No significant changes were observed in IL-10, tumor necrosis factor-α, HSP60, HSP70, thiobarbituric acid reactive substance, and reduced glutathione. Conclusion: Acute total body resistance exercise altered circulating levels of IL-6 and sex differences existed in the temporal pattern and magnitude of this response

Efeito do treinamento contrarresistência e isoflavona na densidade mineral óssea em mulheres na pós-menopausa

This study aimed to investigate the independent and additive effects of counter-resistance training (RT) and soy isoflavone supplement (ISO) on bone mineral density (BMD) and bone turnover in postmenopausal women. This study used a placebo-controlled, double-blinded (soy), randomized two (ISO vs. placebo) x two (RT vs. no RT) design. Eighty sedentary postmenopausal women, aged 45-70 years, were randomly assigned to one of four groups (71 completed a 9-month intervention): RT+ISO (n=15); no RT+ISO (n=20); RT+placebo (n=18); no RT+placebo (n=18). Participants randomized to ISO received 100mg/ day/oral of soy isoflavone; and those to RT attended supervised counter-resistance training sessions at least twice a week. At baseline and 9-month, BMD was estimated by dual-energy X-ray absorptiometry (DXA). Serum levels of C-terminal cross-linked telopeptide of type I collagen (CTX), osteocalcin, and insulin-like growth factor-1 (IGF-1) were measured as bone turnover. ANOVA with time as the repeated measure and test t were used in the statistical analysis. After 9 months of intervention, neither ISO nor RT alone affected BMD at any site or levels of CTX, osteocalcin, and IGF-1 (p>0.05). ISO and RT had no additive effects on BMD and bone turnover. RT groups showed significantly increased muscle strength (+ 35.2%) (p=0.02). We found no additive effects of resistance training and soy isoflavone on bone mineral density or bone turnover in postmenopausal women after 9-months.O estudo teve como objetivo investigar o efeito isolado e combinado do treinamento contrarresistência (TCR) e da suplementação de isoflavona da soja (ISO) sobre a densidade mineral óssea (DMO) e a remodelação óssea em mulheres na pós-menopausa (MPM). Tratou-se de estudo clínico, prospectivo, placebo-controlado, duplo-cego (ISO) e randomizado, envolvendo 80 MPM sedentárias, com idade entre 45-70 anos, randomizadas em quatro grupos (71 completaram nove meses): TCR+ISO (n=15); sem TCR+ISO (n=20); TCR+ placebo (n=18); sem TCR + placebo (n=18). As participantes randomizadas no grupo ISO receberam 100mg/dia/VO (via oral) de isoflavona e as no grupo TCR realizaram sessões supervisionadas de exercícios contrarresistência (mínimo de 2 dias/ semana). Nos momentos inicial e final do estudo, a DMO do colo do fêmur e da coluna lombar foram estimadas pela absortometria radiológica de feixes duplos de energia (DXA) e a força muscular pelo teste de 1-RM. Os valores plasmáticos de telopeptídeos carboxiterminais do colágeno tipo I (CTX), osteocalcina e fator de crescimento semelhante à insulina (IGF-1) foram dosados como marcadores de remodelação óssea. Após 9 meses de intervenção não foram observados efeitos independentes ou aditivos do TCR e ISO sobre a DMO bem como sobre os valores de osteocalcina, CTX e IGF-1 (p>0,05). Houve aumento da força muscular (+ 35,2%) somente nos grupos submetidos ao TCR (p=0,02). Conclui-se que o TCR e ISO não apresentam efeitos combinados ou independentes sobre a DMO do fêmur e da coluna lombar e marcadores da remodelação óssea em MPM após nove meses de intervenção