SLEEP LATENCY AND PHYSICAL ACTIVITY IN OLDER ADULTS WITH MILD COGNITIVE IMPAIRMENT - OURA RING LONGITUDINAL STUDY

Q: How were sleep latency and physical activity intensity measured?

Sleep latency was calculated from attempts to sleep to the first light sleep episode using ring signals, while physical activity intensity was estimated from heart rate variability and skin temperature and classified as light, moderate, or vigorous.

Q: Which type of physical activity was linked to sleep latency changes?

Vigorous activity significantly reduced sleep latency; light activity showed a near-significant trend toward reduction, and moderate activity showed no significant association.

Sep 29, 2026

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Study examines how sleep latency relates to physical activity intensity in older adults with mild cognitive impairment using continuous smart-ring monitoring. Seven participants wore Oura rings for 14 days; photoplethysmography, accelerometer, and gyroscope data estimated sleep latency and activity intensity via heart-rate variability and skin temperature classified as light, moderate, or vigorous. Generalized estimating equations assess longitudinal associations. Results show vigorous activity significantly lowers sleep latency, while moderate activity shows no clear effect and light activity trends toward improvement, suggesting intensity-specific interventions.

LanguageEnglish

CategoryResearch & Report

FormatPDF

Pages2

Reading Time5 min

AccessFree to download

Background

Aim

Method

Results

Conclusion

Innovation in Aging, 2025, Vol. 9, No. S2 1255 Abstract citation ID: igaf122.4193 SLEEP LATENCY AND PHYSICAL ACTIVITY IN OLDER ADULTS WITH MILD COGNITIVE IMPAIRMENT: OURA RING LONGITUDINAL STUDY Jungjoo Lee1, Junhyoung Kim2, Kangeun Lee3, and Aubrey Carter2, 1. Texas A&M University, Texas A&M University, Texas, United States, 2. Texas A&M University, College Station, Texas, United States, 3. Indiana University, College Station, Texas, United States Background: Older adults with mild cognitive impairment (MCI) experience delayed sleep latency due to neuropsychological imbalance. While physical activity may enhance sleep quality, reliance on self-reported measures can reduce reliability because of recall bias. Aim: To investigate the longitudinal relationship between sleep latency and physical activity intensity in older adults with MCI through continuous monitoring using a smart ring system. Method: Seven older adults with MCI wore Oura smart rings for 14 days. Equipped with photoplethysmography, accelerometer, and gyroscope sensors, the rings calculated sleep latency as the interval from attempting sleep to the first light sleep episode, determined by reduced movement and thermoregulatory shifts. Physical activity intensity was estimated from heart rate variability and skin temperature, and classified as light, moderate, or vigorous based on the Metabolic Equivalent of Task. Data were analyzed using generalized estimating equations. Results: Vigorous activity significantly reduced sleep latency. Each additional second of vigorous activity corresponded to a 0.60 second decrease in latency (B = -0.60, SD = 0.21, p < .01, CI [-1.02, -0.18]) . Moderate activity showed no significant association (B = 0.04, SD = 0.11, 95% CI [-0.17, 0.26]) . Light activity showed a near significant reduction of 0.02 seconds per second (B = -0.02, SD = 0.01, 95% CI [-0.05, 0.01]) . Conclusion: Only 1256 Innovation in Aging, 2025, Vol. 9, No. S2 vigorous physical activity was significantly associated with reduced sleep latency. Light activity showed a trend toward improvement, while moderate activity had no clear effect. These results suggest that intensity specific interventions may be required to improve sleep in this population.

FAQs

What was the main objective of the study?

To investigate the longitudinal relationship between sleep latency and physical activity intensity in older adults with mild cognitive impairment using continuous monitoring with a smart ring system.

How were sleep latency and physical activity intensity measured?

Sleep latency was calculated from attempts to sleep to the first light sleep episode using ring signals, while physical activity intensity was estimated from heart rate variability and skin temperature and classified as light, moderate, or vigorous.

Which type of physical activity was linked to sleep latency changes?

Vigorous activity significantly reduced sleep latency; light activity showed a near-significant trend toward reduction, and moderate activity showed no significant association.

Sep 29, 2026

Upload by 4398046744996