Trial reportNutrients2017
An Acute Dose of Specific Grape and Apple Polyphenols Improves Endurance Performance: A Randomized, Crossover, Double-Blind versus Placebo Controlled Study.
Trial report in Nutrients, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers, 2 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
22 citing papers in PubMed, 2 syntheses or guidelines pooled it, 31 citations in OpenAlex.
- Polyphenol supplementation boosts aerobic endurance in athletes: systematic review.Frontiers in physiology · 2024Pooled it
- Effect of food sources of nitrate, polyphenols, L-arginine and L-citrulline on endurance exercise performance: a systematic review and meta-analysis of randomised controlled trials.Journal of the International Society of Sports Nutrition · 2021Pooled it
- Effects of resistance-based training and polyphenol supplementation on physical function, metabolism, and inflammation in aging individuals.GeroScience · 2026Trial
- The Effect of a Hydroxytyrosol-Rich, Olive-Derived Phytocomplex on Aerobic Exercise and Acute Recovery.Nutrients · 2023Trial
- The effect of citrus flavonoid extract supplementation on anaerobic capacity in moderately trained athletes: a randomized controlled trial.Journal of the International Society of Sports Nutrition · 2021Trial
- A single dose of purple grape juice improves physical performance and antioxidant activity in runners: a randomized, crossover, double-blind, placebo study.European journal of nutrition · 2020Trial
- Timed consumption of a New Zealand blackcurrant juice support positive affective responses during a self-motivated moderate walking exercise in healthy sedentary adults.Journal of the International Society of Sports Nutrition · 2019Trial
- Review
- Integrating Bone-Brain Axis Modulation and Tea Consumption for Enhancing Neurovascular Resilience and Patient Rehabilitation Education.Food science & nutrition · 2026Review
- Application of Exercise/Training Models to Evaluate Food Functionality with Special Focus on Preventing Inflammation and Oxidative Stress and Enhancing Exercise Performance.Foods (Basel, Switzerland) · 2025Review
- Polyphenol-Rich Snack Consumption during Endurance Exercise Training Improves Nitric Oxide Bioavailability but does not Improve Exercise Performance in Male Cyclists: A Randomised Controlled Trial.Current developments in nutrition · 2025Article
- Montmorency cherry supplementation enhances 15 km cycling time trial performance: Optimal timing 90-min pre-exercise.European journal of sport science · 2024Article
- Article
- Antioxidant and Antibacterial Properties of a Functional Sports Beverage Formulation.International journal of molecular sciences · 2023Article
- Purple grape juice improves performance of recreational runners, but the effect is genotype dependent: a double blind, randomized, controlled trial.Genes & nutrition · 2022Article
- Effects of Functional Phenolics Dietary Supplementation on Athletes' Performance and Recovery: A Review.International journal of molecular sciences · 2022Review
- Recent Progress in Applicability of Exercise Immunology and Inflammation Research to Sports Nutrition.Nutrients · 2021Review
- Acute Effects ofFrontiers in nutrition · 2021Article
- Montmorency cherry supplementation improves 15-km cycling time-trial performance.European journal of applied physiology · 2019Article
- Fruit-Derived Polyphenol Supplementation for Athlete Recovery and Performance.Sports medicine (Auckland, N.Z.) · 2019Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Polyphenols are thought to be an interesting ergogenic aid for exercise and recovery. However, most studies regarding the effects of polyphenols investigated several days of supplementations. The present work aimed to study the effects of an acute intake of grape and apple polyphenols on the capacity to maintain intense exercise, here named endurance performance. Forty-eight physically active men (31 ± 6 years) were included in this study. During the two testing sessions, volunteers completed an endurance test at a high percentage of their maximal aerobic power and time to exhaustion was measured. Respiratory and pain parameters were also monitored. The preceding evening and 1 h before testing, volunteers had to absorb either 500 mg of polyphenols or placebo according to randomization. In comparison with the placebo, the mean duration of the maximal endurance test was significantly increased with polyphenols (+9.7% ± 6.0%,
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.