Research Gap · Health & Energy · Ready for resolution review
Which modifiable sleep-timing or regularity behaviors have causal evidence for meaningful daytime outcomes?
Prefer intervention studies and high-quality reviews that distinguish association from causal behavior change.
Still open. A reviewed Evidence Decision and trusted Topic protocol exist, but no explicit closure record exists yet.
Evidence boundary
No fixed bedtime tolerance or medical sleep prescription should be inferred from observational associations.
Discovery queries
sleep regularity health behavior systematic review adultsGuardrails: health
Research candidates
- The association between sleep variability and cognitive function: A systematic review and meta analysis · watch · 2026-01-15
- Behavioral interventions to extend sleep duration: A systematic review and meta-analysis · propose-protocol · 2021-12-01
- Dose and timing effects of caffeine on subsequent sleep: a randomized clinical crossover trial · support-existing · 2025-04-11
- The effects of progressive muscle relaxation on sleep quality in adults: a systematic review and meta-analysis of randomized controlled trials · support-existing · 2026-08-06
Reviewed Evidence Decisions
- Dose and timing effects of caffeine on subsequent sleep: a randomized clinical crossover trial · support-existing · reviewed 2026-09-06
- The effects of progressive muscle relaxation on sleep quality in adults: a systematic review and meta-analysis of randomized controlled trials · support-existing · reviewed 2026-09-11
- Behavioral interventions to extend sleep duration: A systematic review and meta-analysis · propose-protocol · reviewed 2026-08-19
- The association between sleep variability and cognitive function: A systematic review and meta analysis · watch · reviewed 2026-08-18
Trusted Topic protocols
- Move Caffeine Earlier When Sleep Matters · reviewed
- Protect Enough Sleep Opportunity and Track Daytime Function · reviewed
Closure rule
Brali does not close this gap because a paper exists or because a protocol sounds plausible. Closure requires an explicit resolution whose reviewed Evidence Decisions map to this Topic and whose referenced protocols are present in the trusted protocol feed for the same Topic.