Study note • PMID 28536531
Caffeine and Bicarbonate for Speed. A Meta-Analysis of Legal Supplements Potential for Improving Intense Endurance Exercise Performance.
How to use this page
This note summarizes one study record. Check the participants, methods, results, and limitations before applying it to training.
- • Design signal: systematic review / meta-analysis.
- • Population relevance: athlete/trained context.
- • Consistency: synthesis evidence present.
- • Practical recommendation depends on tolerance, context, and whether it protects training consistency.
ELI5
In plain language
A 1% change in average speed is enough to affect medal rankings in intense Olympic endurance events lasting ~45 s to 8 min which for example includes 100 m… (systematic review / meta-analysis; athletes).
In this systematic review / meta-analysis, the abstract suggests a positive relationship with 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: A 1% change in average speed is enough to affect medal rankings in intense Olympic endurance events lasting ~45 s to 8 min which for example includes 100 m…
- • In this systematic review / meta-analysis, the abstract suggests a positive relationship with Time-trial performance.
- • Population: athletes.
- • Protocol cues (title/abstract): 8 min • 1 min • 4 min • 100 m • 400 m • 500 m.
Protocol
Protocol (as reported)
- • Intervention/exposure: caffeine, nitrate.
- • Dose/time/duration cues in abstract/title: 8 min • 1 min • 4 min • 100 m • 400 m • 500 m • 4000 m • 000 m.
- • 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 may help, and who should be cautious
Who it helps
- • Athletes similar to the study population (athletes) working on supplements.
- • Athletes who can measure Time-trial performance, Time to exhaustion with a repeatable workout or time-trial effort.
Who should be cautious
- • 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: athletes.
- • Outcomes measured: Time-trial performance, Time to exhaustion.
- • Protocol cues mentioned: 8 min • 1 min • 4 min • 100 m • 400 m • 500 m • 4000 m • 000 m.
- • Source: PubMed PMID 28536531 (2017) — Frontiers in physiology.
Results excerpt
What the abstract reports
“Only peer-reviewed placebo controlled studies were included.”
Note: excerpts are short; for full context, read the paper.
Limits
Limitations and 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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