Introduction: The aim of the present study was to investigate the effect of ingesting a glucose plus fructose drink compared with a glucose-only drink (both delivering carbohydrate at a rate of 1.8 g.min(-1)) and a water placebo on endurance performance.
Methods: Eight male trained cyclists were recruited (age 32 +/- 7 yr, weight 84.4 +/- 6.9 kg, .VO(2max) 64.7 +/- 3.9 mL.kg(-1).min(-1), Wmax 364 +/- 31 W). Subjects ingested either a water placebo (P), a glucose (G)-only beverage (1.8 g.min(-1)), or a glucose and fructose (GF) beverage in a 2:1 ratio (1.8 g.min(-1)) during 120 min of cycling exercise at 55% Wmax followed by a time trial in which subjects had to complete a set amount of work as quickly as possible (approximately 1 h). Every 15 min, expired gases were analyzed and blood samples were collected.
Results: Ingestion of GF resulted in an 8% quicker time to completion during the time trial (4022 s) compared with G (3641 s) and a 19% improvement compared with W (3367 s). Total carbohydrate (CHO) oxidation was not different between GF (2.54 +/- 0.25 g.min(-1)) and G (2.50 g.min(-1)), suggesting that GF led to a sparing of endogenous CHO stores, because GF has been shown to have a greater exogenous CHO oxidation than G.
Conclusion: Ingestion of GF led to an 8% improvement in cycling time-trial performance compared with ingestion of G.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1249/mss.0b013e31815adf19 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Hepatic and Pancreatic Cellular Response to Early Life Nutritional Mismatch.
Endocrinology
January 2025
Department of Pediatrics, Divisions of Neonatology & Developmental Biology and Endocrinology, Neonatal Research Center of the UCLA Children's Discovery & Innovation Institute at the David Geffen School of Medicine at UCLA, Los Angeles, California 90095-1752.
To determine the basis for perinatal nutritional mismatch causing metabolic dysfunction associated steatotic liver disease (MASLD) and diabetes mellitus, we examined adult phenotype, hepatic transcriptome, and pancreatic β-islet function. In prenatal caloric restricted rat with intrauterine growth restriction (IUGR) and postnatal exposure to high fat with fructose (HFhf) or high carbohydrate (RC), we investigated male and female IUGR-Hfhf and IUGR-RC, versus HFhf and CON offspring. Males more than females displayed adiposity, glucose intolerance, insulin resistance, hyperlipidemia, hepatomegaly with hepatic steatosis.
View Article and Find Full Text PDFIntestinal distension induced by luminal D-allulose promotes GLP-1 secretion in male rats.
Endocrinology
January 2025
Laboratory of Nutritional Biochemistry, Graduate School of Agriculture, Hokkaido University, Sapporo 060-8589, Japan.
The secretion of glucagon-like peptide-1 (GLP-1) is promoted by various nutrients, and glucose and fructose stimulate GLP-1 secretion via intracellular metabolism. D-Allulose (allulose), a non-metabolizable epimer of D-fructose, is also effective in stimulating GLP-1 secretion, although its underlying mechanism remains unclear. We previously observed intestinal distension after the oral administration of allulose, accompanied by increased GLP-1 secretion in rats, possibly because of the low or slow absorbability of allulose.
View Article and Find Full Text PDFIn Silico Analysis of Anti-Cancer Activity of Exopolysaccharide Isolated from Novel Pseudolagarobasidium acaciicola through Mass Production, Gel Permeation Separation, and Compositional Analysis.
Crit Rev Oncog
January 2025
Plant Pathology and Microbiology Laboratory, Regional Plant Resource Centre, Bhubaneswar, India.
Bacteria, fungi, and algae are examples of microorganisms that synthesize polysaccharides, which are macromolecules that belong to the carbohydrate class. Production of polysaccharides represents an alternative to chemical and plant-derived compounds that could be used for human well-being which requires implementation of different methods standardized during the extraction and purification process. In the current investigation, Pseudolagarobasidium acaciicola, a novel fungal source of exopolysaccharide (EPS) was used which produced 2773.
View Article and Find Full Text PDFTypes of dietary sugars and carbohydrates, cardiometabolic risk factors, and risk of diabetes: a cohort study from the general Danish population.
Nutr J
January 2025
Department of Public Health, Section of Epidemiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
Background: The role of carbohydrates in diabetes risk is of particular interest due to conflicting results. This study aims to examine the prospective association between types of dietary carbohydrates (fiber, starch, total sugar, glucose, fructose, lactose, maltose, and added sugar) and the risk of diabetes. Further, this study examines the cross-sectional associations between these nutrients and cardiometabolic risk factors.
View Article and Find Full Text PDFViability of guinea pig () spermatozoa diluted in Tris-buffer extenders stored at 5.00 ˚C.
Vet Res Forum
December 2024
Department of Theriogenology, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran.
The cooling procedure markedly diminishes the quality of guinea pig () sperms, primarily because their membranes are highly susceptible to this process. This susceptibility triggers the generation of reactive oxygen species and free radicals, ultimately leading to lipid peroxidation in the sperm membrane. Surprisingly, there has been a lack of research on the use of Tris-based extenders to safeguard guinea pig sperm under refrigeration conditions.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!