Habit
Maintain regular bed/wake schedule across weekdays and weekends.[2804,4104,4131, etc.]
Superscript reference numbers link to the Sources bibliography.
Composite Rating
Blends evidence depth, community direction, safety friction, and completeness.
Evidence Intensity
72/100
Moderate depth from human/RCT/meta counts
Community Direction
45
Positive Lean • confidence Moderate
Safety Friction
24/100
Early signal from adverse/interaction markers
Data Completeness
100%
Studies 13 • mentions 9 • links 22
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Classification: add.[15,1278,2804, etc.]
Best fit: Most users, especially those with low energy or circadian drift..[15,1278,2804, etc.]
Goal alignment: Sleep, Metabolic Health, Mood, Longevity, Energy.[15,1278,2804, etc.]
Classification
Add
Evidence Tier
MEDIUM
Best Fit
Most users, especially those with low energy or circadian drift.
Primary Focus
Sleep, Metabolic Health
Clinical Depth
Humans: 61 • RCTs: 1 • Meta: 1
Cohort / Real-World
Cohort signals: 21
Safety Markers
Adverse signals: 1 • Interactions: 0
Freshness, trend, and study timeline for this item
Status
Trend
↑ Growing evidence base
Depth
61 total studies · 8 recent
Timeline
Total indexed
61
Human studies
61
Sleep signals
61
Cohort signals
21
Cardiometabolic signals
15
Neuropsych signals
12
Weighted direction score: 45 (Positive Lean)
Medium when human evidence exists but with lower depth/replication, or non-human evidence is substantial.
Total indexed
61
Human studies
61
Sleep signals
61
Cohort signals
21
Cardiometabolic signals
15
Neuropsych signals
12
Randomized trials
1
Meta-analyses
1
Safety adverse signals
1
Dependency signals
1
Animal-only studies
0
Distribution of evidence by study design strength
Evidence Strength: Moderate
PMID 39433622 • 2024 Dec
An Interpersonal and Meta-analytic Approach to Parenting Behaviors and Adolescent Sleep.
Clin Child Fam Psychol Rev
Open PubMedPMID 40924703 • 2025 Oct 1
Reduced sleep irregularity does not impact peripheral vascular function before or following total sleep deprivation.
J Appl Physiol (1985)
Open PubMedPMID 37738616 • 2024 Jan 11
Sleep regularity is a stronger predictor of mortality risk than sleep duration: A prospective cohort study.
Sleep
Open PubMedBenefit reports: 4
Adverse reports: 1
No-effect reports: 0
Mixed reports: 1
Unclear reports: 3
Signal confidence: 0.57
Benefits
Adverse
No Effect
Community confidence 0.57 with mentions: benefit 3, adverse 0, no-effect 0.
Subreddit coverage: Biohackers, DecidingToBeBetter, sleep, stopdrinking.
post • r/Biohackers • benefit
Built a caffeine cutoff calculator that personalizes to your metabolism, sleep schedule, and earlier intake — now I use it daily I built this during studies for a cloud architecture certification (AWS) as a small tool to improve sleep—and …
Open mentionpost • r/sleep • mixed
Fixing my sleep schedule honestly fixed like half my life and I didn’t expect it to I used to treat sleep like it was optional. I'd stay up scrolling, gaming, working, whatever… and then wonder why my entire life felt like it was falling a…
Open mentionpost • r/stopdrinking • unclear
The Daily Check-In for Saturday, November 15th: Just for today, I am NOT drinking! *We may be anonymous strangers on the internet, but we have one thing in common. We may be a world apart, but we're here together!* **Welcome to the 24 hour…
Evidence Sources
PUBMED • Human lifestyle/habit literature
Counts from structured habit/exposure PubMed query set.
Outcome: Humans 61, RCT 1, meta 1, cohort 21, sleep signals 61, cardiometabolic signals 15.[2804,4104,4131, etc.]
Open sourcePUBMED • 2024 • Human evidence curation set
PMID 39433622 from Clin Child Fam Psychol Rev.
Outcome: See linked PubMed abstract for methods and outcomes.[, etc.]
In vitro / tissue
0
Composite of study volume, RCTs, and meta-analyses
PMID 36327055 • 2022 Dec
Sleep and Circadian Disturbance in Cardiovascular Risk.
Curr Cardiol Rep
Open PubMedPMID 40507019 • 2025 May 22
The Joint Association of Diet Quality and Sleep Regularity with Incident Cardiovascular Disease in the Multi-Ethnic Study of Atherosclerosis.
Nutrients
Open PubMedPMID 40066650 • 2025 Jun 13
Chronotype, sleep timing, sleep regularity, and cancer risk: A systematic review.
Sleep
Open PubMedPMID 34202991 • 2021 Jun 20
Lifestyle Factors and Sleep Health across the Lifespan.
Int J Environ Res Public Health
Open PubMedPMID 34274811 • 2021 Sep
The Sleep Regularity Questionnaire: development and initial validation.
Sleep Med
Open PubMedPMID 28607474 • 2017 Jun 12
Irregular sleep/wake patterns are associated with poorer academic performance and delayed circadian and sleep/wake timing.
Sci Rep
Open PubMedPMID 36789869 • 2023 Feb 21
Sleep Irregularity and Subclinical Markers of Cardiovascular Disease: The Multi-Ethnic Study of Atherosclerosis.
J Am Heart Assoc
Open PubMedPMID 39392631 • 2024 Oct 1
Sleep, Well-Being, and Cognition in Medical Interns on a Float or Overnight Call Schedule.
JAMA Netw Open
Open PubMedPMID 39018075 • 2024 Jul 1
Environmental Bright Light Exposure, Depression Symptoms, and Sleep Regularity.
JAMA Netw Open
Open PubMedPMID 41259946 • 2025 Dec
Sleep regularity as an important component of sleep hygiene: a systematic review.
Sleep Med Rev
Open PubMedpost • r/sleep • benefit
What finally helped you fix your sleep schedule after years of inconsistency? I’ve struggled with an inconsistent sleep schedule for *years*. I'd try going to bed early one night, then stay up till 3 AM the next. Have tried many things to …
Open mentionpost • r/DecidingToBeBetter • unclear
Best way to fix a poor sleep schedule? I’m stuck going to bed at 5am and waking up late. What’s the best method for fixing the sleep schedule almost instantly? I have a lot on arm and need a quick fix. All nighter method: When 5am comes ar…
Open mentionpost • r/sleep • benefit
Odd sleep schedule It kind of seems genetic cause my grandma is the same way and my dad was too back when he was alive . For starters I'm a 25 year old woman and for the life of me I can't get on a normal sleep schedule. It's like my brain…
Open mentioncomment • r/Biohackers • unclear
Cool project. I've been drinking too late and getting to sleep too late, I'll use this to help taper down my tea drinking time so I can slowly adjust my sleep schedule.
Open mentionCommunity Sources
PUBMED • 2025 • Human evidence curation set
PMID 40924703 from J Appl Physiol (1985).
Outcome: See linked PubMed abstract for methods and outcomes.[2804,4104,4131, etc.]
Open sourcePUBMED • 2024 • Human evidence curation set
PMID 37738616 from Sleep.
Outcome: See linked PubMed abstract for methods and outcomes.[2804,4104,4131, etc.]
Open sourcePUBMED • 2022 • Human evidence curation set
PMID 36327055 from Curr Cardiol Rep.
Outcome: See linked PubMed abstract for methods and outcomes.[2804,4104,4131, etc.]
Open sourcePUBMED • 2025 • Human evidence curation set
PMID 40507019 from Nutrients.
Outcome: See linked PubMed abstract for methods and outcomes.[2804,4104,4131, etc.]
Open sourcePUBMED • 2025 • Human evidence curation set
PMID 40066650 from Sleep.
Outcome: See linked PubMed abstract for methods and outcomes.[2804,4104,4131, etc.]
Open sourcePUBMED • 2021 • Human evidence curation set
PMID 34202991 from Int J Environ Res Public Health.
Outcome: See linked PubMed abstract for methods and outcomes.[2804,4104,4131, etc.]
Open sourcePUBMED • 2021 • Human evidence curation set
PMID 34274811 from Sleep Med.
Outcome: See linked PubMed abstract for methods and outcomes.[2804,4104,4131, etc.]
Open sourcePUBMED • 2017 • Human evidence curation set
PMID 28607474 from Sci Rep.
Outcome: See linked PubMed abstract for methods and outcomes.[2804,4104,4131, etc.]
Open sourcePUBMED • 2023 • Human evidence curation set
PMID 36789869 from J Am Heart Assoc.
Outcome: See linked PubMed abstract for methods and outcomes.[2804,4104,4131, etc.]
Open sourcePUBMED • 2024 • Human evidence curation set
PMID 39392631 from JAMA Netw Open.
Outcome: See linked PubMed abstract for methods and outcomes.[2804,4104,4131, etc.]
Open sourcePUBMED • 2024 • Human evidence curation set
PMID 39018075 from JAMA Netw Open.
Outcome: See linked PubMed abstract for methods and outcomes.[2804,4104,4131, etc.]
Open sourcePUBMED • 2025 • Human evidence curation set
PMID 41259946 from Sleep Med Rev.
Outcome: See linked PubMed abstract for methods and outcomes.[2804,4104,4131, etc.]
Open source