Study note • PMID 16541379
Heart rate variability and performance at two different altitudes in well-trained swimmers.
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: athlete/trained context.
- • Consistency: single-study evidence.
- • Practical recommendation depends on tolerance, context, and whether it protects training consistency.
ELI5
In plain language
The aim of this study was to compare the effects of training at two different altitudes on heart rate variability (HRV) and performance in well-trained swimmers. (controlled study; well-trained participants).
The abstract reports an association involving Recovery speed (not necessarily causation). Treat this as a signal, not a guarantee; confirm methods and context in the full paper.
Takeaways
What the abstract suggests
- • Study question: The aim of this study was to compare the effects of training at two different altitudes on heart rate variability (HRV) and performance in well-trained swimmers.
- • The abstract reports an association involving Recovery speed (not necessarily causation).
- • Population: well-trained participants.
- • Protocol cues (title/abstract): 17 days • 6 weeks • 1200 m • 1850 m.
Protocol
Protocol (as reported)
- • Intervention/exposure: heart rate variability, hrv.
- • Dose/time/duration cues in abstract/title: 17 days • 6 weeks • 1200 m • 1850 m.
- • 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 (well-trained 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: well-trained participants.
- • Outcomes measured: Recovery speed.
- • Protocol cues mentioned: 17 days • 6 weeks • 1200 m • 1850 m.
- • Source: PubMed PMID 16541379 (2006) — International journal of sports medicine.
Results excerpt
What the abstract reports
“the same training loads induced a positive effect on HRV and performance at 1200 m but not at 1850 m.”
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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