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The effect of quercetin and citrulline on cycling time trial performance.
- Source :
-
Journal of the International Society of Sports Nutrition [J Int Soc Sports Nutr] 2024 Dec; Vol. 21 (1), pp. 2416909. Date of Electronic Publication: 2024 Oct 17. - Publication Year :
- 2024
-
Abstract
- Background: There is growing interest in the use of nutrition and dietary supplements to optimize training and time-trial (TT) performance in cyclists. Separately, quercetin (QCT) and citrulline (CIT) have been used as ergogenic aids to improve oxygen (VO <subscript>2</subscript> ) kinetics, perceived effort, and cycling TT performance. However, whether the combination of QCT and CIT can provide additive benefits and further enhance cycling performance production is currently unknown.<br />Methods: We examined 28-days of QCT + CIT supplementation on TT performance and several performance measures (i.e. mean power, VO <subscript>2</subscript> , respiratory exchange ratio (RER), and rate of perceived exertion (RPE)). Forty-eight highly trained cyclists were assigned to one of four supplementation groups: (1) QCT + CIT (QCT: 500 mg, CIT: 3000 g), (2) QCT (500 mg), (3) CIT (3000 mg), or (4) placebo (3500 mg of a zero-calorie flavored crystal light package). Supplements were consumed two times per day for 28 consecutive days. Participants performed a 20-km cycling time-trial race, pre- and post-supplementation to determine the impact of the combined effects of QCT + CIT.<br />Results: There were no potential benefits of QCT +CIT supplementation on TT performance and several performance measures. However, there was an improvement in VO <subscript>2</subscript> from pre-to-post-supplementation in QCT ( p = 0.05) and CIT ( p = 0.04) groups, but not in the QCT+CIT and PL groups.<br />Conclusions: QCT + CIT does not seem beneficial for 20-km TT performance; further exploration with a focus on an increase in cycling duration or QCT+CIT combined with additional polyphenols may amplify any perceived bioactive or metabolic effects on cycling performance. The efficacy of QCT + CIT supplementation to improve cycling performance remains ambiguous.
- Subjects :
- Humans
Male
Adult
Performance-Enhancing Substances administration & dosage
Performance-Enhancing Substances pharmacology
Young Adult
Double-Blind Method
Sports Nutritional Physiological Phenomena
Quercetin administration & dosage
Quercetin pharmacology
Bicycling physiology
Citrulline administration & dosage
Citrulline pharmacology
Athletic Performance physiology
Dietary Supplements
Oxygen Consumption drug effects
Subjects
Details
- Language :
- English
- ISSN :
- 1550-2783
- Volume :
- 21
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Journal of the International Society of Sports Nutrition
- Publication Type :
- Academic Journal
- Accession number :
- 39417670
- Full Text :
- https://doi.org/10.1080/15502783.2024.2416909