Study note • PMID 12153547
Physical training increases heart rate variability in healthy prepubertal children.
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: controlled study.
- • Population relevance: mixed/unclear athlete specificity.
- • Consistency: single-study evidence.
- • Practical recommendation depends on tolerance, context, and whether it protects training consistency.
ELI5
In plain language
BACKGROUND: The aim of the present study was to evaluate the effect of an endurance training program on heart rate variability (HRV) in prepubertal healthy children and to determine… (controlled study; participants).
The abstract doesn’t indicate a clear change in Recovery speed under the tested conditions. Treat this as a signal, not a guarantee; confirm methods and context in the full paper.
Takeaways
What the abstract suggests
- • Study question: BACKGROUND: The aim of the present study was to evaluate the effect of an endurance training program on heart rate variability (HRV) in prepubertal healthy children and to determine…
- • The abstract doesn’t indicate a clear change in Recovery speed under the tested conditions.
- • Population: participants.
- • Protocol cues (title/abstract): 1 h • 5 h • 5 min • 80% HRmax.
Protocol
Protocol (as reported)
- • Intervention/exposure: heart rate variability, hrv (vs control group).
- • Dose/time/duration cues in abstract/title: 1 h • 5 h • 5 min • 80% HRmax.
- • Outcomes: Recovery speed.
- • 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 (participants) working on monitoring.
- • Athletes who can measure Recovery speed 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: controlled study.
- • Population: participants.
- • Comparator: control group.
- • Outcomes measured: Recovery speed.
- • Protocol cues mentioned: 1 h • 5 h • 5 min • 80% HRmax.
- • Source: PubMed PMID 12153547 (2002) — European journal of clinical investigation.
Results excerpt
What the abstract reports
“V O(2max) increased significantly (+15.5% +/- 12.1; P < 0.01) after the training program.”
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).
- • Single studies often don’t generalize to your event, history, and training load; treat results as a starting point.
- • 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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