Six-week wearable sleep study with weekly balance and cognition tests in 15 older adults
In 15 community-dwelling older adults, wearable sleep tracking was feasible over six weeks; habitual sleep consistency correlated with better cognition, while longer acute sleep and lethargy periods were linked to worse balance and slower mobility. [1]
Automatic summary · not editorially reviewed
The key findings
The six-week study included 15 community-dwelling older adults and tested wearable sleep tracking against daily diaries, with 100% versus 89.4% compliance. [1]
Participants underestimated nocturnal awakenings by 64.9 minutes and overestimated total sleep time by 31.3 minutes. [1]
Longer average sleep correlated with better working memory, while extended sleep and lethargy periods of 6 to 10 days or more were linked to impaired dynamic balance and slower functional mobility. [1]
The source at a glance
- Study type / format
- Six-week longitudinal observational cohort and feasibility study (abstract).
- Population / context
- 15 community-dwelling older adults.
- Summary based on
- Study abstract
- Publication status
- Preprint · peer-review status not confirmed
- Original publication
- September 30, 2026
Feasibility in 15 older adults over six weeks
This six-week longitudinal observational cohort and feasibility study included 15 community-dwelling older adults. Sleep was tracked objectively with a consumer-grade wearable (Oura Ring) and subjectively with daily diaries. Motor function (Mini-BESTest, Timed Up and Go) and cognition (NIH Toolbox) were tested weekly. The wearable reached 100% compliance versus 89.4% for diaries. The abstract reports feasibility and associations; it does not report a control group or whether the wearable changed outcomes.
Supporting source [1]
Sleep recall gaps and habitual versus acute sleep links
A Bland-Altman analysis showed severe subjective misperception of sleep: participants systematically underestimated nocturnal awakenings by 64.9 minutes and overestimated total sleep time by 31.3 minutes. Habitual sleep consistency was described as protective of cognitive health, and longer average sleep strongly correlated with better working memory. In within-person analyses, cognition stayed resilient to acute sleep deviations, while motor systems showed dose-dependent vulnerability: extended sleep and lethargy periods of 6 to 10 days or more significantly impaired dynamic balance and slowed functional mobility. These are associations, not proven causes.
Supporting source [1]
Abstract-only scope of the sleep-balance-cognition findings
All details here come from the abstract; the full text was not reviewed. The abstract does not report follow-up beyond six weeks, effect sizes with confidence intervals, or adjustment for confounders. The authors describe the wearable as a feasible tool for remote monitoring of fall risk and functional decline, but the abstract does not show that monitoring prevents falls. The small sample of 15 limits how far the between-person and within-person correlations can be generalized.
Supporting source [1]
How to interpret this
Abstract only; the full text was not reviewed. The abstract reports no control group, no follow-up beyond six weeks, no effect sizes with confidence intervals and no confounder adjustment. The sample is 15 people, and the reported links are associations, not causes.
Based on the study abstract; the full paper, tables and supplementary data were not reviewed.
Source & supporting passages
Wang H, Li Y, Chandrashekhar R, Shin YC, Arias J, Tietje IF, Shah S, Gupta I, Stefaniak E, Patel SD, Smith LR. · europepmc.org · September 30, 2026