Painelli V.S.,Laboratory of Applied Nutrition and Metabolism |
Roschel H.,Laboratory of Applied Nutrition and Metabolism |
Roschel H.,Laboratory of Neuromuscular Adaptations to Strength Training |
Roschel H.,University of Sao Paulo |
And 6 more authors.
European Journal of Applied Physiology | Year: 2011
It has been previously reported that carbohydrate (CHO) mouth rinse can improve exercise performance. The proposed mechanism involves increased activation of brain regions believed to be responsible for reward/motivation and motor control. Since strengthrelated performance is affected by central drive to the muscles, it seems reasonable to hypothesize that the positive CNS response to oral CHO sensing may counteract the inhibitory input from the muscle afferent pathways minimizing the drop in the central drive. The purpose of the current study was to test if CHO mouth rinse affects maximum strength and strength endurance performance. Twelve recreationally strength-trained healthy males (age 24.08 ± 2.99 years; height 178.09 ± 6.70 cm; weight 78.67 ± 8.17 kg) took part in the study. All of the tests were performed in the morning, after an 8 h overnight fasting. Subjects were submitted to a maximum strength test (1-RM) and a strength endurance test (six sets until failure at 70% of 1-RM), in separate days under three different experimental conditions (CHO mouth rinse, placebo-PLA mouth rinse and control-CON) in a randomized crossover design. The CHO mouth rinse (25 ml) occurred before every attempt in the 1-RM test, and before every set in the endurance strength test. Blood glucose and lactate were measured immediately before and 5 min post-tests. There were no significant differences in 1-RM between experimental conditions (CHO 101 ± 7.2 kg; PLA 101 ± 7.4 kg; CON 101 ± 7.2 kg; p = 0.98). Furthermore, there were no significance between trial differences in the number of repetitions performed in each set (p = 0.99) or the total exercise volume (number of repetitions × load lifted [kg]) (p = 0.98). A main Effect for time (p < 0.0001) in blood lactate concentration was observed in both tests (1-RM and strength endurance). Blood glucose concentration did not differ between conditions. In conclusion, CHO mouth rinse does not affect maximum strength or strength endurance performance. © Springer-Verlag 2011.
Chaves D.F.S.,Laboratory of Applied Nutrition and Metabolism |
Solis M.Y.,Laboratory of Applied Nutrition and Metabolism |
Gandin P.,Southern Cross University of Brazil |
Benatti F.B.,Laboratory of Applied Nutrition and Metabolism |
And 4 more authors.
Annals of Nutrition and Metabolism | Year: 2013
Chronic inflammation contributes to the pathophysiology of many chronic diseases. Dietary fibers and antioxidants may exert anti-inflammatory effects. The objective of this study was to determine whether meals with different fibers and antioxidants may elicit a different response in inflammatory markers in healthy volunteers. On 3 separate days, subjects (n = 8) consumed one of three isocaloric meals with different antioxidant (vitamin E, selenium and β-carotene) and fiber content (high, intermediate and low) in a randomized crossover design. Blood samples were collected at different times: 0 min (before the meal), and 30 and 240 min after the meal. Plasma interleukin (IL)-6, IL-10, tumor necrosis factor (TNF)-α, glucose and insulin content were evaluated at each time point. There were no significant differences for any of the parameters at baseline. Furthermore, plasma levels of TNF-α, IL-6 and IL-10 were unchanged at the 30- and 240-min time points whatever meal consumed. Moreover, the cytokine responses to glucose and insulin intake were not significantly different between experimental conditions. In conclusion, isocaloric meals with different fiber, β-carotene, vitamin E and selenium contents do not acutely affect inflammatory markers in healthy young males. Copyright © 2013 S. Karger AG, Basel.