Study note • PMID 9624275
Work shift duration: a review comparing eight hour and 12 hour shift systems.
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: review.
- • 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
Shiftwork is now a major feature of working life across a broad range of industries. (review; participants).
In this review, the abstract is mixed or unclear for Sleep quality, Recovery speed. Treat this as a signal, not a guarantee; confirm methods and context in the full paper.
Takeaways
What the abstract suggests
- • Study question: Shiftwork is now a major feature of working life across a broad range of industries.
- • In this review, the abstract is mixed or unclear for Sleep quality, Recovery speed.
- • Population: participants.
- • Protocol cues (title/abstract): 12 hour • 12 hours.
Protocol
Protocol (as reported)
- • Intervention/exposure: work, shift.
- • Dose/time/duration cues in abstract/title: 12 hour • 12 hours.
- • 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 (participants) 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: review.
- • Population: participants.
- • Outcomes measured: Sleep quality, Recovery speed.
- • Protocol cues mentioned: 12 hour • 12 hours.
- • Source: PubMed PMID 9624275 (1998) — Occupational and environmental medicine.
Results excerpt
What the abstract reports
“The research findings are largely equivocal.”
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).
- • 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.
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