Trial reportEuropean journal of nutrition2020
Ergogenic effects of caffeine on peak aerobic cycling power during the menstrual cycle.
Trial report in European journal of nutrition, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers, 5 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
30 citing papers in PubMed, 5 syntheses or guidelines pooled it.
- Acute caffeine ingestion and exercise performance in women: a systematic review and meta-analysis of menstrual-cycle phase and hormonal contraceptive status.Frontiers in nutrition · 2026Pooled it
- The Effect of Menstrual Cycle on Perceptual Responses in Athletes: A Systematic Review With Meta-Analysis.Frontiers in psychology · 2022Pooled it
- Ergogenic Effects of Acute Caffeine Intake on Muscular Endurance and Muscular Strength in Women: A Meta-Analysis.International journal of environmental research and public health · 2021Pooled it
- CYP1A2 genotype and acute ergogenic effects of caffeine intake on exercise performance: a systematic review.European journal of nutrition · 2021Pooled it
- The Effects of Menstrual Cycle Phase on Exercise Performance in Eumenorrheic Women: A Systematic Review and Meta-Analysis.Sports medicine (Auckland, N.Z.) · 2020Pooled it
- Effects of different caffeine doses on fat oxidation and cardiovascular response during exercise at FATmax in overweight/obese female college students.Journal of the International Society of Sports Nutrition · 2026Trial
- The effects of menstrual cycle phase on acute critical power testing performance in healthy females.European journal of applied physiology · 2026Trial
- No effects of caffeine on cycling to exhaustion and perceptual responses in non-caffeine-restricted subjects.Journal of the International Society of Sports Nutrition · 2025Trial
- Influence of the CYP1A2 c.European journal of nutrition · 2024Trial
- Acute caffeine supplementation enhances several aspects of shot put performance in trained athletes.Journal of the International Society of Sports Nutrition · 2022Trial
- Similar ergogenic effect of caffeine on anaerobic performance in men and women athletes.European journal of nutrition · 2021Trial
- Caffeine increases whole-body fat oxidation during 1 h of cycling at Fatmax.European journal of nutrition · 2021Trial
- Trial
- Acute caffeine intake increases performance in the 15-s Wingate test during the menstrual cycle.British journal of clinical pharmacology · 2020Trial
- Exploring the potential synergistic pharmacological and psychological effects of caffeine on exercise performance: a placebo-balanced study.Biology of sport · 2026Article
- No Ergogenic Effect of Caffeine or Sodium Bicarbonate on Resistance Exercise Performance: A Double-Blind Crossover Study with Sex-Based Analysis.Sports (Basel, Switzerland) · 2025Article
- Relationships Between Sport-Specific Anaerobic Tests, Interlimb Asymmetry, and Bilateral Deficit as Measured from Vertical Jump Performances in Highly Trained Taekwondo Athletes.Sports (Basel, Switzerland) · 2025Article
- Exercise performance at different phases of the menstrual cycle: measurements, differences, and mechanisms - a narrative review.Frontiers in endocrinology · 2025Review
- Caffeine ingestion before exercise improves prolonged intermittent-sprint performance of team-sport athletes in normobaric hypoxia.Frontiers in nutrition · 2025Article
- The Effect of Caffeine Supplementation on Female Volleyball Players' Performance and Wellness during a Regular Training Week.Nutrients · 2023Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeRecent investigations have established that the ingestion of a moderate dose of caffeine (3-6 mg kg
methodsThirteen well-trained eumenorrheic triathletes (age = 31 ± 6 years; body mass = 58.6 ± 7.8 kg) participated in a double-blind, cross-over, randomised experimental trial. In the (1) early follicular (EF); (2) preovulation (PO); (3) and mid luteal (ML) phases, participants either ingested a placebo (cellulose) or 3 mg kg
resultsIn comparison to the placebo, caffeine increased Wmax in the EF (4.13 ± 0.69 vs. 4.24 ± 0.71 W kg
conclusionCaffeine increased peak aerobic cycling power in the early follicular, preovulatory, and mid luteal phases. Thus, the ingestion of 3 mg of caffeine per kg of body mass might be considered an ergogenic aid for eumenorrheic women during all three phases of the menstrual cycle.
Indexed as
Identifiers
31691019What 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.