Study note • PMID 38836626
Effect of caffeine ingestion on time trial performance in cyclists: a systematic review and meta-analysis.
Worth trying if it fits your goal and context.
ELI5
In plain language
This meta-analysis aimed to determine the efficacy of caffeine ingestion to increase cycling TT performance in cyclists and to evaluate the optimal dosage range for maximum effect. (systematic review / meta-analysis; cyclists).
In this systematic review / meta-analysis, the abstract doesn’t find a clear benefit for Time-trial performance. Treat this as a signal, not a guarantee; confirm methods and context in the full paper.
Takeaways
What the abstract suggests
- • Study question: This meta-analysis aimed to determine the efficacy of caffeine ingestion to increase cycling TT performance in cyclists and to evaluate the optimal dosage range for maximum effect.
- • In this systematic review / meta-analysis, the abstract doesn’t find a clear benefit for Time-trial performance.
- • Population: cyclists.
- • Protocol cues (title/abstract): 6 mg/kg • 3 mg/kg • 4-6 mg/kg • 1-3 mg/kg.
Protocol
Protocol (as reported)
- • Intervention/exposure: caffeine.
- • Dose/time/duration cues in abstract/title: 6 mg/kg • 3 mg/kg • 4-6 mg/kg • 1-3 mg/kg.
- • Outcomes: Time-trial performance, Time to exhaustion.
- • Replication note: abstracts often omit adherence and timing; confirm details before changing training or supplementation.
Fit
Who it helps, and who should skip it
Who it helps
- • Athletes similar to the study population (cyclists) working on supplements.
- • Athletes who can measure Time-trial performance, Time to exhaustion with a repeatable workout or time-trial effort.
Who should skip
- • If you have symptoms or conditions that make the intervention risky, get professional guidance.
- • If you’re near race day and can’t safely test, defer the experiment.
Methods
What the study actually did
- • Design: systematic review / meta-analysis (placebo-controlled).
- • Population: cyclists.
- • Outcomes measured: Time-trial performance, Time to exhaustion.
- • Protocol cues mentioned: 6 mg/kg • 3 mg/kg • 4-6 mg/kg • 1-3 mg/kg.
- • Source: PubMed PMID 38836626 (2024) — Journal of the International Society of Sports Nutrition.
Results excerpt
What the abstract reports
“Subgroup analysis showed that moderate doses of caffeine intake (4-6 mg/kg) significantly improved cycling performance (SMD (Time) = -0.55, 95% confidence interval (CI) = -0.84 ~ -0.26, p < 0.01, I(2) = 35%; SMD (MPO) = 0.44, 95% CI = 0.09 ~ 0.79,…”
Note: excerpts are short; for full context, read the paper.
Limits
Limitations & bias
- • Abstract-only summaries can miss critical details (population, protocol, adherence, and context).
- • Reviews and consensus statements mix protocols and populations; recommendations may not match your exact constraints.
- • If your context differs (elite vs recreational; cycling vs running), adjust expectations and be conservative.
- • This is performance information, not medical advice.
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