期刊
NUTRIENTS
卷 14, 期 23, 页码 -出版社
MDPI
DOI: 10.3390/nu14235128
关键词
glucose; lactate metabolism; resistance exercise; cycling; cardio-pulmonary exercise testing; fructose
资金
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [491183248]
This study found that individualized amounts of glucose, fructose, and a combination of these did not enhance high-intensity anaerobic endurance performance and moderate resistance exercise in healthy young individuals, compared to a placebo.
Background: The effects of glucose, fructose and a combination of these on physical performance have been subject of investigation, resulting in diverse findings. Objective: The aim of this study was to investigate how an individualized amount of glucose, fructose, and a combination of these compared to placebo (sucralose) alter endurance performance on a cycle ergometer, lower and upper body resistance exercise performance at individualized thresholds in healthy young individuals. Methods: A total of 16 healthy adults (9 females) with an age of 23.8 +/- 1.6 years and a BMI of 22.6 +/- 1.8 kg/m(2) (body mass (BM) 70.9 +/- 10.8 kg, height 1.76 +/- 0.08 m) participated in this study. During the screening visit, the lactate turn point 2 (LTP2) was defined and the weights for chest-press and leg-press were determined. Furthermore, 30 min prior to each exercise session, participants received either 1 g/kg BM of glucose (Glu), 1 g/kg BM of fructose (Fru), 0.5 g/kg BM of glucose/fructose (GluFru) (each), or 0.2 g sucralose (placebo), respectively, which were dissolved in 300 mL of water. All exercises were performed until volitional exhaustion. Time until exhaustion (TTE) and cardio-pulmonary variables were determined for all cycling visits; during resistance exercise, repetitions until muscular failure were counted and time was measured. During all visits, capillary blood glucose and blood lactate concentrations as well as venous insulin levels were measured. Results: TTE in cycling was 449 +/- 163 s (s) (Glu), 443 +/- 156 s (Fru), 429 +/- 160 s (GluFru) and 466 +/- 162 s (Pla) (p = 0.48). TTE during chest-press sessions was 180 +/- 95 s (Glu), 180 +/- 92 s (Fru), 172 +/- 78 s (GluFru) and 162 +/- 66 s (Pla) (p = 0.25), respectively. Conclusions: Pre-exercise supplementation of Glu, Fru and a combination of these did not have an ergogenic effect on high-intensity anaerobic endurance performance and on upper and lower body moderate resistance exercise in comparison to placebo.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据