ABSTRACT
@#Introduction: Carbohydrate (CHO) mouth rinsing can enhance sports performance through a central action mediated by receptors in the mouth. This study examined the effect of a CHO mouth rinse on salivary lysozyme concentrations, mood states and running performances. Methods: Ten males recreational runners were randomised to three running trials with a 1 week recovery period between the trials. Each trial involved running at 75% maximum heart rate (HRmax) for 1 h, followed by a 15 min time trial. The participants used a CHO mouth rinse, placebo (PLA) solution or control (CON, no solution) every 15 min during the exercise. Heart rate (HR), rating of perceived exertion (RPE) and mood states were recorded pre-, during and post-exercise. Saliva samples were collected pre-, post- and 1 h post-exercise. Results: There was no significant interaction and time effect (P > 0.05) on the salivary lysozyme concentration and running performance, but it was significant (P < 0.05) for HR and RPE (increase in all trials). However, there was no significant difference (P > 0.05) in salivary lysozyme concentrations, running performances, HR values or RPE between the trials. Mood states were not significantly different (P > 0.05) between the trials, but one of the mood sub-scales showed a significant (P < 0.001) time effect (increase fatigue in all trials). Conclusion: CHO mouth rinsing did not affect physiological parameters, salivary lysozyme concentrations, mood states or running performance among recreational runners.
ABSTRACT
O perfil antropométrico e/ou dietético de corredores de elite tem sido estudado; porém, pouco se conhece sobre estas características em praticantes de corrida de rua "recreacionais". O objetivo deste estudo foi caracterizar o perfil nutricional de praticantes de corrida de rua de um clube esportivo de Belo Horizonte (BH)/MG, encaminhados ao ambulatório de nutrição da clínica-escola de uma faculdade privada da cidade. A amostra foi composta por 19 indivíduos, na faixa etária entre 28 e 53 anos. Para o diagnóstico do estado nutricional foi obtida análise da adequação da ingestão de energia e dos macronutrientes - carboidratos (CHO), lipídios (LIP) e proteínas (PTN) - por meio do método recordatório de 24 horas (R24h), além da caracterização do perfil antropométrico. Os resultados da avaliação dietética indicaram que, segundo as recomendações propostas pelas DRIs (ingestão dietética de referência), a distribuição energética entre os macronutrientes em ambos os sexos encontra-se adequada sendo de 48,1 ± 9,2 por cento (CHO); 29,6 ± 7,2 por cento (LIP); e 22,3 ± 4,96 por cento (PTN). Entretanto, quando se considera o consumo em g/kg de peso corporal, a ingestão de CHO apresentou-se baixa (3,54 ± 1,45g/kg/d) e a de PTN alta (1,7 ± 0,57g/kg/d) para esta modalidade esportiva. Quanto ao consumo energético total, 89,5 por cento dos corredores estavam com ingestão energética abaixo dos valores recomendados, resultando em deficiência calórica diária. Em relação às características antropométricas, o percentual de gordura corporal ( por centoGC) médio entre homens e mulheres não apresentou diferença estatística e mostrou-se adequado segundo a faixa etária. A circunferência da cintura (CC) e razão cintura quadril (RCQ) do grupo indicaram valores normais, não representando risco aumentado para doenças cardiovasculares. Concluímos que há indicativos que, apesar de os desportistas avaliados terem realizado distribuição energética em por cento adequada...
The anthropometric and/or dietary profile of elite runners has been studied; however, little is known about the characteristics of recreational street runners. This study was aimed to characterize the nutritional profile of recreational runners from a sports club in Belo Horizonte, MG, Brazil, who were referred to a nutritional clinic of a local private college. The sample study was composed of 19 athletes, aged between 28 and 53 years. The diagnosis of the runners' nutritional status was obtained by assessment of their energy intake and macronutrients - carbohydrates (CHO), lipids (LIP), and proteins (PTN) - through the 24-hour dietary recall (R24h), as well as analysis of their anthropometric profile. The results obtained from the dietary evaluation showed that according to the recommendations proposed by the DRIs (Dietary Reference Intakes), the distribution of energy among the macronutrients in both men and women was adequate: 48.1±9.2 percent (CHO), 29.6±7.2 percent (LIP) and 22.3±4.96 percent (PTN). However, when considering energy consumption in g/kg of body weight, the intake of CHO was low (3.54±1.45g/kg/d) and of PTN was high (1.7±0.57 g/kg/d) for this type of recreational exercise. Regarding total energy consumption, 89.5 percent of runners presented energy intake below the recommended values, resulting in daily caloric deficiency. Concerning the anthropometric evaluation, the average percentage of body fat ( percentG) for men and women was not statistically different and was considered adequate based on their age. Waist circumference (WC) and waist/hip ratio (WHR) of the studied group showed normal results and do not represent increased risk for cardiovascular diseases. In conclusion, the study indicates that although the athletes showed adequate caloric distribution of macronutrients, it was still not sufficient to meet the energy requirements of their modality, suggesting hence that continuous nutritional guidance is needed.