Carbohydrate-Electrolyte Feedings Improve 1 h Time Trial Cycling Performance
Open accessAbstract
Carbohydrate-electrolyte (CE) feedings have been shown to improve endurance performance at moderate intensities (60-75% VO2max) and or more than 2 h duration. The effects of CE feedings during high intensity exercise (i.e. > or = 80% VO2 max) of shorter duration (approximately 1 h) are less clear. Therefore the purpose of the present study was to investigate the effect of the ingestion of a 7.6% CE solution during exercise on time trial cycling performance of approximately 1 h. This type of performance testing has been shown to be more reproducible (coefficient of variation 3.35%) than the traditional exercise test to exhaustion. On two occasions and in random order nineteen endurance trained cyclists completed an exercise test requiring the accomplishment of a set amount of work as fast as possible (time trial) under strictly standardized conditions. As the start and during the trials they drank in total 14 ml/kg of either a 7.6% CE solution or artificially flavored and colored water (placebo). Time to complete the set amount of work was significantly reduced and thus performance was significantly increase (p < 0.001) with the CE drink by 2.3%. Time to complete the set amount of work was 58.74 +/- 0.52 min with CE and 60.15 +/- 0.65 min with placebo (p < 0.001). Average workload during the time trials was 297.5 +/- 1.4W and 291.0 +/- 10.3 W, respectively. Subjects exercised at 76.4 +/- 0.7% of their maximal work rate (Wmax) with CE and at 74.8% Wmax with placebo (p < 0.001). It was concluded tht also in relative short term (1h) high intensity (75% Wmax) cycling exercise ingestion of a carbohydrate-electrolyte solution compared to placebo improves performance.
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- Authors
- Jeukendrup, A., Brouns, F., Wagenmakers, A., & Saris, W.
- Affiliations
- Maastricht University (NL)
- Venue
- International Journal of Sports Medicine
- Publisher
- Georg Thieme Verlag KG
- Published
- 1997-02
- Volume
- 18
- Issue
- 02
- Pages
- 125-129
- ISSN
- 0172-4622 (ISSN-L)
- 1439-3964
- OpenAlex
- W2073208535
- Cited by
- 271
- References
- 0
- Citations by year
- 2026: 2 · 2025: 6 · 2024: 5 · 2023: 5 · 2022: 3 · 2021: 8 · 2020: 8 · 2019: 10 · 2018: 9 · 2017: 7 · 2016: 17 · 2015: 12 · 2014: 14 · 2013: 23 · 2012: 11
- FWCI
- 2.72
- Type
- journal article
- Language
- en
- Open access
- Licence
- other-oa
- Locations
- International Journal of Sports Medicine (publishedVersion)
- PubMed (publishedVersion)
- Research Publications (Maastricht University) (publishedVersion, other-oa)
- Research Publications (Maastricht University) (submittedVersion, other-oa)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Muscle metabolism and nutrition
- Health Sciences › Medicine › Orthopedics and Sports Medicine › Sports Performance and Training
- Health Sciences › Medicine › Physiology › Thermoregulation and physiological responses
- Keywords
- carbohydrate-electrolyte solution, cycling time trial, high-intensity exercise, endurance performance, fluid intake, cyclists, exercise performance, endurance cyclists
- MeSH terms
- Adult, Beverages, Bicycling, Energy Intake, Diet, Dietary Carbohydrates, Electrolytes, Exercise Test, Female, Humans, Male, Motor Activity, Oxygen Consumption, Physical Endurance, Placebos, Time Factors, Work, Reproducibility of Results
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