Carbohydrate mouth rinse improves cycling performance carried out until the volitional exhaustion.

BACKGROUND: Carbohydrates (CHO) are among the most investigated nutritional ergogenic aids, and may be consumed in different forms, e.g., mouth rinse with carbohydrate solution (MRCS). In this sense, the aim of this study was to evaluate the impact of MRCS on the performance of physically active individuals undergoing a physical exercise session carried out until the volitional exhaustion. METHODS: This is a counter-balanced randomized study, with a double-blind design. The sample consisted of twenty-one physically active healthy men with a mean (±SD) of age of 22.4 (±2.7) years old, 76.7 (±6.0) cm of height,12.1% (±3.7) of body fat mass, and 23.9 (±2.4) kg/m2 of body mass index. After familiarizing the participants with the protocol (cycle ergometer, with oral mouth rinse procedure) and assessing the maximal lactate steady state the cycling exercise was performed until the volitional exhaustion in the following conditions: without mouth rinse (CONTROL), PLACEBO and MRCS. RESULTS: Time to reach exhaustion was statistically different (P<0.0001) between conditions (control: 43.0±27.5 minutes; placebo: 57.4±30.6 minutes; MRCS: 70.9±30.3 minutes). CONCLUSIONS: The administration of MRCS was shown to be effective in improving cycling performance, increasing the time to exhaustion until the volitional exhaustion. Thus, the use of methodology proposed by the present study may help coaches and practitioners improve the performance of physically active young adults.

Associação da quimiotoxicidade com o estado (de la quimiotoxicidad con el estado) nutricional em pacientes oncológicos / Nutritional status and chemotoxicity in oncology patients

Introdução: O câncer é uma enfermidade caracterizada pelo (El cáncer es una enfermedad que se caracteriza por el) crescimento desordenado de células, cujo tratamento com quimioterapia atua no seu controle ou (cuyo tratamiento con quimioterapia actúa en su control o) remissão e pode prolongar a sobrevida. No entanto (Sin embargo), a quimioterapia pode causar uma série de efeitos colaterais, denominados quimiotoxicidade, levando ao déficit nutricional e comprometendo sua tolerância e (llevando al déficit nutricional y comprometiendo su tolerancia y) eficácia. Objetivo: Verificar a associação da quimiotoxicidade com o estado nutricional de pacientes oncológicos. Métodos: Estudo transversal, de caráter retrospectivo, com análise de prontuário (con análisis de historia clínica) de pacientes com neoplasia de tumores sólidos, com 3 ciclos realizados de quimioterapia. Foram coletadas variáveis (Fueron contempladas variables) sociodemográficas, clínicas, antropométricas e a quimiotoxicidade foi categorizada conforme a National Cancer Institute (NCI). Resultados: Foram avaliados 126 pacientes, com idade média 54.6 ± 13.9 anos, predominantemente do sexo feminino (68.3%). As neoplasias mais prevalentes foram mama (51%) e trato gastrointestinal (34.5%) e o estadiamento IV foi prevalente (con prevalencia del estadio IV) (40.5%). A quimiotoxicidade apresentou-se desde o primeiro ciclo, com 52.5% de toxicidade bioquímica. Comparando o primeiro e terceiro ciclo não foi observada associação significativa entre a toxicidade e o índice de massa corporal (IMC), leucócitos, plaquetas e hemoglobina, mas observou-se tendência na toxicidade (pero se observó una tendencia en la toxicidad) de neutrófilos (p = 0.053). A toxicidade gastrointestinal afetou significativamente a perda de peso durante o (la pérdida de peso durante el) tratamento (p = 0.024). Conclusão: A quimiotoxicidade foi observada desde o primeiro ciclo, no entanto apenas a toxicidade do trato gastrointestinal apresentou (sin embargo, solo la toxicidad del tracto gastrointestinal presentó una) associação com a perda de peso corporal.

Introduction: Cancer is a disease characterized by the uncontrolled growth of cells, whose treatment with chemotherapy acts as a control or remission and may prolong survival. However, chemotherapy can cause a number of side effects, called chemotoxicity, leading to malnutrition and compromising its effectiveness and tolerance. Objective: To investigate the association between chemotoxicity and the nutritional status of cancer patients. Methods: Longitudinal and retrospective study with chart analysis of patients with cancer of solid tumors, with at least 3 cycles of chemotherapy performed. Sociodemographic, clinical, anthropometric variables were collected and chemotoxicity was categorized according to the National Cancer Institute (NCI, 1999). Results: We evaluated 126 patients, mean age of 54.6 ± 13.9 years, predominantly female (68.3%). The most common cancers were breast (51%) and gastrointestinal tract (34.5%) and most were classified as stage IV (40.5%). Chemotoxicity showed up from the first cycle, with 52.5% biochemical toxicity. Comparing the first and the third cycles, no difference in toxicity was observed in relation to body mass index (BMI), white blood cells, platelets and hemoglobin; but there was a trend in the association of toxicity with neutrophils (p = 0.053). The GI toxicity significantly affected weight loss during treatment (p = 0.024). Conclusion: chemotoxicity was observed from the first cycle; however only the toxicity of the gastrointestinal tract was associated with weight loss.