Study note • PMID 23143705
Seasonal changes in physical performance and heart rate variability in high level futsal players.
Worth trying if it fits your goal and context.
ELI5
In plain language
The aim of this study was to determine the changes in physical performance and resting heart rate variability (HRV) in professional futsal players during the pre-season and in-season training periods. (controlled study; n=11 athletes).
Effects on Recovery speed are mixed or unclear from the abstract alone. 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 determine the changes in physical performance and resting heart rate variability (HRV) in professional futsal players during the pre-season and in-season training periods.
- • Effects on Recovery speed are mixed or unclear from the abstract alone.
- • Population: n=11 athletes.
- • Protocol cues (title/abstract): 20 m • 298 m • 396 m.
Protocol
Protocol (as reported)
- • Intervention/exposure: heart rate variability, hrv (vs comparison group).
- • Dose/time/duration cues in abstract/title: 20 m • 298 m • 396 m.
- • Outcomes: Recovery speed.
- • 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 (n=11 athletes) working on monitoring.
- • Athletes who can measure Recovery speed 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: controlled study.
- • Population: n=11 athletes.
- • Comparator: comparison group.
- • Outcomes measured: Recovery speed.
- • Protocol cues mentioned: 20 m • 298 m • 396 m.
- • Source: PubMed PMID 23143705 (2013) — International journal of sports medicine.
Results excerpt
What the abstract reports
“At M2, there was an increase in HRV vagal-related indices compared with M1 that was maintained at M3.”
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).
- • 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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