SynthesisSports medicine (Auckland, N.Z.)2022
Effect of Pre-Exercise Caffeine Intake on Endurance Performance and Core Temperature Regulation During Exercise in the Heat: A Systematic Review with Meta-Analysis.
Synthesis in Sports medicine (Auckland, N.Z.), 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 1 of them a synthesis 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
11 citing papers in PubMed, 1 synthesis or guideline pooled it, 18 citations in OpenAlex.
- Pooled it
- Effects of Acute Caffeine Ingestion on Morning Temperature, Mood, Reactive Agility and Cognitive Measures in Males: A Standardized Approach.Nutrients · 2026Trial
- Caffeine ingestion compromises thermoregulation and does not improve cycling time to exhaustion in the heat amongst males.European journal of applied physiology · 2024Trial
- Trial
- Nutritional Strategies to Support Performance Maintenance and Recovery in Football Under Hot Environmental Conditions: A Narrative Review.Nutrients · 2026Review
- Nutrition for Tactical Athletes: Insights, Applications and Research Gaps.Sports medicine (Auckland, N.Z.) · 2026Review
- Perspectives on enhancing human performance in the heat: Is the solution to simply "just add water"?Sports medicine and health science · 2025Review
- Review
- Review
- Dietary Quality and Nutrient Intakes of Elite Paracyclists.Nutrients · 2024Article
- Reference Standard for Digital Infrared Thermography of the Surface Temperature of the Lower Limbs.Bioengineering (Basel, Switzerland) · 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
7 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundHeat is associated with physiological strain and endurance performance (EP) impairments. Studies have investigated the impact of caffeine intake upon EP and core temperature (C
objectiveTo use a meta-analytical approach to determine the effect of pre-exercise caffeine intake on EP and C
designSystematic review with meta-analysis. DATA SOURCES: Four databases and cross-referencing. DATA ANALYSIS: Weighted mean effect summaries using robust variance random-effects models for EP and C STUDY SELECTION: Placebo-controlled, randomized studies in adults (≥ 18 years old) with caffeine intake at least 30 min before endurance exercise ≥ 30 min, performed in ambient conditions ≥ 27 °C.
resultsRespectively six and 12 studies examined caffeine's impact on EP and C
conclusionCaffeine ingestion of 6 mg/kg body mass ~ 1 h before exercise in the heat may provide a worthwhile improvement in EP, is unlikely to be deleterious to EP, and trivially increases the rate of change in C
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.