Smartphone screen time fails as a momentary proxy for sedentary behavior because a substantial proportion occurs during non-sedentary behavior
In a sample of 63 adult caregivers, a median of 25.9% of smartphone screen time occurred during non-sedentary behavior, with individual variability ranging from 5.6% to 73.7%. Among non-sedentary screen-use epochs, 52.1% were inactive and 47.9% were active, and app type influenced the proportion of non-sedentary use.
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Smartphone screen time fails as a momentary proxy for sedentary behavior because a substantial proportion occurs during non-sedentary behavior The current body of evidence comprises 1 study. EvidenceHub rates the overall confidence at 32/100 (low).
The Claim
Smartphone screen time fails as a momentary proxy for sedentary behavior because a substantial proportion occurs during non-sedentary behavior
This conclusion is most relevant to: Adult caregivers of preschool-aged children from an ongoing cohort study.
What the Research Shows
The conclusion draws on 1 linked study. Highlights from the cited literature:
- ▸Not all screen time is sedentary: evidence from aligned smartphone sensing and accelerometry data in adults. (Journal of activity, sedentary and sleep behaviors, 2026) —
How It Works
The proposed biological pathway:
- ▸Smartphone screen time is measured via passive sensing app
- ▸Movement behavior is measured via wrist-worn accelerometer
- ▸Data are aligned at 5-second epochs during waking wear time
- ▸Result: 25.9% of screen time occurs during non-sedentary behavior, indicating screen time is not a reliable proxy for sedentary behavior
Who Might Benefit
Evidence fit by population:
- ▸Adult caregivers of preschool-aged children from an ongoing cohort study
Recommended Dose
N/A
Limitations & Caveats
Important context when interpreting this evidence:
- ▸Small sample size of 63 participants
- ▸Sample limited to adult caregivers of preschool-aged children, limiting generalizability
Frequently Asked Questions
What percentage of smartphone screen time was non-sedentary?▼
A median of 25.9% of smartphone screen time occurred during non-sedentary behavior, with a wide range from 5.6% to 73.7% across participants.
Which apps were associated with more non-sedentary screen use?▼
Apps such as Phone, Maps, Camera, and YouTube showed higher proportions of non-sedentary use, while social media applications were predominantly sedentary.
How was screen time and movement behavior measured?▼
Smartphone screen time was objectively assessed using the Android-based passive sensing app Chronicle, and movement behavior was measured using wrist-worn accelerometers with data processed via GGIR and the SedUp algorithm.
What are the implications of these findings?▼
The findings suggest that using smartphone screen time as a proxy for sedentary behavior is inaccurate, which has implications for measurement and interventions targeting sedentary behavior or smartphone use.
References
- 1.Culverhouse J, Finnegan OL, Bowen K, Nelakuditi S, Ghosal R, Radesky JS, Adair T, Restino M, White JW, Zhong Z, Hadj-Amar B, Holmes A, Kiely K, Burkart S, Adams EL, Weaver RG, Beets M, Armstrong B. “Not all screen time is sedentary: evidence from aligned smartphone sensing and accelerometry data in adults..” Journal of activity, sedentary and sleep behaviors, 2026. PMID: 42426888 DOI: 10.1186/s44167-026-00109-y