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  • Moderate-to-regular...

Moderate-to-regular daily sleep patterns are associated with enhanced cognitive function: Study

Dr. Kamal Kant KohliWritten by Dr. Kamal Kant Kohli Published On 2025-09-05T20:45:23+05:30  |  Updated On 5 Sept 2025 8:45 PM IST
Moderate-to-regular daily sleep patterns are associated with enhanced cognitive function: Study
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Daily sleep and activity are fundamental to both physical and mental health. Although previous studies have largely emphasized quantitative aspects such as sleep duration and physical activity time, there is increasing focus on how daily sleep varies among days. Less variable and consistent daily sleep patterns have been associated with decreased cardiovascular risk, lower mortality rates, and protective effects against incident dementia. Nevertheless, whether such associations of daily sleep patterns vary in individuals in the preclinical stage of Alzheimer's disease or those experiencing subjective cognitive decline remains poorly understood.

In this study, researchers evaluated the sleep regularity of 458 participants aged 45-89 years who subjectively reported cognitive and/or sleep issues. Each participant wore a three-axis accelerometer on the nondominant hand continuously for 24 h for 7 days. In addition to undergoing a standardized cognitive assessment battery, blood samples were collected from the participants to measure the levels of serum brain-derived neurotrophic factor (BDNF), a protein essential for synaptic plasticity and overall cognitive health.

The results demonstrated a clear linear relationship between sleep regularity and global cognitive performance. However, serum BDNF levels showed an inverse U-shaped relationship-peaking in participants with moderate sleep regularity and declining at both ends-among those with either highly irregular or excessively rigid.

These findings suggest that maintaining moderate-to-regular daily sleep patterns supports cognitive health, whereas rigid daily sleep patterns could potentially reduce an individual's adaptability to daily changes in real-world situations. Therefore, this study emphasizes the importance of balance in lifestyle schedules and its value in future strategies to prevent Alzheimer's disease, as well as dementia.

Reference:

Yue Cao, Jaehee Lee, Jaehoon Seol, Kyohei Shibuya, Jieun Yoon, Tetsuaki Arai, Masashi Yanagisawa, Tomohiro Okura, Sleep regularity is associated with cognitive function and shows an inverted U-shaped relationship with serum brain-derived neurotrophic factor, Sleep Medicine, https://doi.org/10.1016/j.sleep.2025.106688.

Sleep Medicinesleepcognitive functiondementiacognitive declineAlzheimer
Source : Sleep Medicine
Dr. Kamal Kant Kohli
Dr. Kamal Kant Kohli

Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751

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