Study note • PMID 39683610
Effects of Precooling on Endurance Exercise Performance in the Heat: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.
Low risk + high feasibility for most athletes.
ELI5
In plain language
An increasing number of studies have explored the effects of precooling on endurance exercise performance in the heat, yet the available results remain inconsistent. (systematic review / meta-analysis; participants).
In this systematic review / meta-analysis, the abstract suggests a positive relationship with VO₂max, Lactate threshold. Treat this as a signal, not a guarantee; confirm methods and context in the full paper.
Takeaways
What the abstract suggests
- • Study question: An increasing number of studies have explored the effects of precooling on endurance exercise performance in the heat, yet the available results remain inconsistent.
- • In this systematic review / meta-analysis, the abstract suggests a positive relationship with VO₂max, Lactate threshold.
- • Population: participants.
- • Protocol cues: abstract may omit dose/timing; use the full paper to replicate accurately.
Protocol
Protocol (as reported)
- • Intervention/exposure: endurance, interval.
- • Dose/time/duration: abstract doesn’t include enough detail; use the full paper’s methods section.
- • Outcomes: VO₂max, Lactate threshold.
- • 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 endurance.
- • Athletes who can measure VO₂max, Lactate threshold 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.
- • Population: participants.
- • Outcomes measured: VO₂max, Lactate threshold.
- • Source: PubMed PMID 39683610 (2024) — Nutrients.
Results excerpt
What the abstract reports
“Precooling is an effective approach to improve endurance exercise performance in the heat.”
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.
Coaching beta
Get a plan that adapts to your life.
Join the 26weeks.ai TestFlight beta for adaptive coaching, recovery-aware adjustments, and race-week reminders.
Keep going
Performance Science Lab
Research-backed protocols and evidence grades for endurance performance — built for athletes.
Endurance performance research
Endurance is built by repeatable work you can recover from — not by heroic weeks you can’t sustain.
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.
VO₂max research for endurance athletes
A ceiling metric: useful, but endurance performance is usually limited by durability and pacing.
Lactate threshold research for endurance athletes
Threshold is 'how fast you can go for a long time' — where most endurance races are decided.