Peer-reviewed study
Phone in bed is not neutral
Leave your smartphone out of bed: quantitative analysis of smartphone use effect on sleep
Source details
PubMed-linked citation target.
- Authors
- Kheirinejad et al.
- Journal
- Personal and Ubiquitous Computing. 2022.
- Identifiers
- PMID 36405389 · DOI 10.1007/s00779-022-01694-w
Claim guardrail
What this page should prevent.
Use as a sleep-latency and routine audit, not as a diagnosis of insomnia or a guarantee that phone removal fixes sleep.
Geebs coaching takeaway
The study only matters if it changes a behavior.
The easiest sleep upgrade for a busy client is often environmental: keep the phone out of bed before trying to optimize supplements.
Content angles
Safe ways to translate it.
Your body keeps receipts from bedtime
Phone charging spot audit
Sleep is a fat-loss compliance lever
Exact answer pages
Questions that cite this source.
Caffeine and sleep answer
Does caffeine before bed hurt sleep?
Caffeine before bed can hurt sleep for enough people that it deserves a real audit, especially if late training, pre-workout, or afternoon coffee keeps showing up before bad sleep. The coaching move is not panic; it is testing timing, dose, and consistency.
Phone and sleep answer
Does using your phone in bed hurt sleep?
Phone use in bed is not neutral for many people. It can keep the brain engaged, expose you to light at the wrong time, and push sleep later. The useful coaching move is not a perfect evening routine; it is getting the phone out of the bed environment first.
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