Study note • PMID 34711770
Monitoring Effects of Sleep Extension and Restriction on Endurance Performance Using Heart Rate Indices.
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: crossover trial.
- • 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
Roberts, SSH, Aisbett, B, Teo, W-P, and Warmington, S. (crossover trial; athletes).
The abstract reports an association involving Sleep quality, 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: Roberts, SSH, Aisbett, B, Teo, W-P, and Warmington, S.
- • The abstract reports an association involving Sleep quality, Recovery speed (not necessarily causation).
- • Population: athletes.
- • Protocol cues: abstract may omit dose/timing; use the full paper to replicate accurately.
Protocol
Protocol (as reported)
- • Intervention/exposure: sleep extension, sleep restriction (vs comparison group).
- • Dose/time/duration: abstract doesn’t include enough detail; use the full paper’s methods section.
- • Outcomes: Sleep quality, 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 (athletes) working on sleep.
- • Athletes who can measure Sleep quality, 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: crossover trial.
- • Population: athletes.
- • Comparator: comparison group.
- • Outcomes measured: Sleep quality, Recovery speed.
- • Source: PubMed PMID 34711770 (2022) — Journal of strength and conditioning research.
Results excerpt
What the abstract reports
“Compared with D4 of NS, RPE:HR TT was lower on D4 of SE ( p = 0.008)-when TT performances were faster.”
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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