Nutrição e performance esportiva – Artigo 15
Potential Role of Amino Acid/Protein Nutrition and Exercise in Serum Albumin Redox State
Abstract: Albumin is the major protein in the serum of mammals. It is synthesized exclusively in the liver, before being secreted into the circulation. Similar to skeletal muscle protein, albumin synthesis is stimulated by dietary amino acids and proteins as well as exercise. Albumin has three isoforms based on the redox states of the free cysteine residue at position 34. The redox state of serum albumin has long been extensively investigated in terms of oxidative stress-related chronic diseases, with ...
Nutrição e performance esportiva – Artigo 14
Native whey protein with high levels of leucine results in similar post-exercise muscular anabolic responses as regular whey protein: a randomized controlled trial
Abstract
Background: Protein intake is essential to maximally stimulate muscle protein synthesis, and the amino acid leucine seems to possess a superior effect on muscle protein synthesis compared to other amino acids. Native whey has higher leucine content and thus a potentially greater anabolic effect on muscle than regular whey (WPC-80). This study compared the acute anabolic effects of ingesting 2 × 20 g of native whey ...
Nutrição e performance esportiva – Artigo 13
Mouth rinsing with a carbohydrate solution attenuates exercise-induced decline in executive function
Abstract
Background: A decline in executive function could have a negative influence on the control of actions in dynamic situations, such as sports activities. Mouth rinsing with a carbohydrate solution could serve as an effective treatment for preserving the executive function in exercise. The purpose of this study was to examine the effects of mouth rinsing with a carbohydrate solution on executive function after sustained moderately high-intensity exercise. Methods: Eight young healthy ...
Nutrição e performance esportiva – Artigo 12
Low Vitamin D Levels Do Not Predict Hyperglycemia in Elderly Endurance Athletes (but in Controls)
Abstract
Background and AimRecent studies revealed a link between hypovitaminosis D3 and the risk for hyperglycemia.Further mechanistic and interventional investigations suggested a common reason for both conditions rather than a causal relationship. Exposure to sunlight is the most relevant source of vitamin D3 (25(OH)D), whereas adipose tissue is able to store relevant amounts
of the lipophilic vitamin. Since running/bicycling leads to increased out-door time and alters physiological ...
Nutrição e performance esportiva – Artigo 11
Fructose ingestion impairs expression of genes involved in skeletal muscle’s adaptive response to aerobic exercise
Abstract
Background: The inverse relationship between exercise capacity and its variation over time and both cardiovascular and all-cause mortality suggests the existence of an etiological nexus between cardiometabolic diseases and the molecular regulators of exercise capacity. Coordinated adaptive responses elicited by physical training enhance exercise performance and metabolic efficiency and possibly mediate the health benefits of physical exercise. In contrast, impaired ...
Nutrição e performance esportiva – Artigo 10
Evaluation of the effects of two doses of alpha glycerylphosphorylcholine on physical and psychomotor performance
Abstract
Background: Recent studies have suggested that alpha glycerylphosphorylcholine (A-GPC) may be an effective ergogenic aid. The present study was designed to assess the efficacy of two doses of A-GPC in comparison to placebo and caffeine for increasing countermovement jump performance, isometric strength, and psychomotor function. Methods: Forty-eight healthy, college aged males volunteered for the present study and underwent baseline assessment of countermovement jump ...
Nutrição e performance esportiva – Artigo 09
Effects of two pre-workout supplements on concentric and eccentric force production during lower body resistance exercise in males and females: a counterbalanced, double-blind, placebo-controlled trial
Abstract
Background: Pre-workout supplements purportedly enhance feelings of energy, reduce fatigue and improve exercise performance. The purpose of this study was to examine the performance effects of caffeinated and noncaffeinated multi-ingredient pre-workout supplements. Methods: In a counterbalanced, double-blind, placebo-controlled design, eccentric and concentric force production
dur...
Nutrição e performance esportiva – Artigo 08
Effects of Potassium Bicarbonate Supplements on Circulating microRNA Expression
Several studies suggest that neutralizing acid load in the diet with alkali had favorable effects on intermediate markers of musculoskeletal health. We examined whether alkali supplementation with potassium bicarbonate [(KHCO3); 81 mmol/d; n = 12] vs placebo (n = 12) for 84 days altered serum microRNAs, potential biomarkers associated with innumerable biological processes including bone and muscle metabolism. Serum microRNAs, urinary net acid excretion (UNAE), urinary N-telopeptide
(UNTX), urinary calcium (UCa), ...
