A new study has found a strong link between circadian rhythm and dementia risk. Published in the medical journal Neurology, researchers found that participants who were more active during a specific window of the day had an increased risk of dementia, a condition characterized by declines in memory, language, reasoning, and problem-solving skills.

American Academy of NeurologyJan 4 2026 Circadian rhythms that are weaker and more fragmented are linked to an increased risk of dementia, according to a new study published on December 29, 2025, in Neurology®, the medical journal of the American Academy of Neurology.

Researchers say future studies exploring circadian rhythm approaches such as light exposure or lifestyle changes could reveal new ways to reduce dementia risk.

Deep within the fabric of our existence, a hidden world of rhythms and cycles governs the intricate dance of life. Chronobiology, the study of biological rhythms, reveals the fascinating story of how living organisms, from the simplest bacteria to complex human beings, are influenced by the periodic patterns of nature.