Consistent Sleep Window
Keeping a steady sleep and wake time — not just total hours — is one of the strongest levers for how you feel.
Effect size
Large
Evidence quality
Meta-analysis
How much you need
7–9 hours with sleep and wake times that vary by less than ~30 minutes.
How it works
Regular timing restores cognitive homeostasis, clears metabolic waste during deep sleep, and keeps the HPA (stress) axis well regulated. Irregular timing creates 'social jet lag' that blunts mood and focus.
Works best for
High stress, cognitive fatigue, and anyone whose sleep times drift across the week.
Contraindications
None — this is a baseline physiological need. (BeWell never uses strict sleep restriction therapy.)
Key citations
- Sleep, Wellbeing, and Behavioral Interventions (meta-analysis)
BeWell offers evidence-based behavioral habits, not medical treatment. Nothing here is a diagnosis or a substitute for professional care.