Study note • PMID 39339818
Caffeine Placebo Effect in Sport and Exercise: A Systematic Review.
Worth trying if it fits your goal and context.
ELI5
In plain language
The objective of this review article is to systematically identify the caffeine placebo effect in sport and exercise activities. (expert consensus / guideline; participants).
In this expert consensus / guideline, 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: The objective of this review article is to systematically identify the caffeine placebo effect in sport and exercise activities.
- • In this expert consensus / guideline, the abstract suggests a positive relationship with Time-trial performance.
- • Population: participants.
- • Protocol cues: abstract may omit dose/timing; use the full paper to replicate accurately.
Protocol
Protocol (as reported)
- • Intervention/exposure: caffeine.
- • Dose/time/duration: abstract doesn’t include enough detail; use the full paper’s methods section.
- • 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 (participants) 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: expert consensus / guideline (placebo-controlled).
- • Population: participants.
- • Outcomes measured: Time-trial performance, Time to exhaustion.
- • Source: PubMed PMID 39339818 (2024) — Nutrients.
Results excerpt
What the abstract reports
“The objective of this review article is to systematically identify the caffeine placebo effect in sport and exercise activities.”
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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Performance Science Lab
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Supplements performance research
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Caffeine for endurance performance: a practical protocol
Evidence-informed protocol: Caffeine for endurance performance: a practical protocol. Practical steps, who it helps, and what to watch out for.
Time-trial performance research for endurance athletes
Practical performance outcome used in many studies: closer to racing than lab-only metrics.
Time to exhaustion research for endurance athletes
A lab outcome that can still guide training: it often tracks fatigue resistance.