What question did this study set out to answer?

To explore how physical activity and sleep quality together influence cognitive function in older adults.

Joint Associations of Physical Activity and Sleep Quality With Cognitive Function Among Older Adults in China

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Observational analysis reveals improved cognitive function in older adults through physical activity and sleep quality interventions.

To explore how physical activity and sleep quality together influence cognitive function in older adults.
Observational analysis of an 8-week clustered randomized controlled trial
24-month follow-up in rural older Chinese
Cognitive function assessed using the Telephone Interview for Cognitive Status
Linear mixed effects models and stratified analysis conducted
Significant interaction found between physical activity and sleep quality on global cognition (P=0.04)
Higher physical activity combined with good sleep quality linked to better global cognition and memory
High physical activity and good sleep quality group showed the best cognitive function (β=0.58)

Li et al. (2026) studied this question.

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