Stable circadian patterns linked to better glucose control in type 2 diabetes
A study of 122 insulin-treated type 2 diabetes patients used continuous glucose monitors and wearable activity trackers over 10 days. Those with the most stable circadian rhythms were about 2.3 times more likely to meet blood glucose management goals than those with the least stable rhythms. The findings, published in Metabolism, held after adjusting for age, BMI, and HbA1c.
Researchers at Korea University College of Medicine examined 122 insulin-treated type 2 diabetes patients at Ansan Hospital between 2021 and 2024. Participants wore continuous glucose monitors and activity trackers for ten days, yielding data on glucose, sleep, movement, and heart rate. The study appeared in Metabolism and was peer reviewed.
Among those with steadiest daily rhythms, 46.3% reached glucose management targets, versus 20.0% in least stable group. Afternoon activity showed strongest link to time in target range and lower glucose variability. Adequate sleep was tied to less hypoglycemia risk and smaller glucose swings.
For people with insulin-treated type 2 diabetes, these findings could encourage attention to consistent daily routines alongside medication, diet, and exercise. Clinicians may consider sleep regularity and afternoon activity when discussing glucose management, though the reported link is an association, not proof that changing rhythms directly improves control. Wearable tools might make such patterns easier to track, potentially supporting personalized advice. The impact may be greatest for patients who already use continuous monitors or activity trackers, while broader benefits would depend on access and further intervention studies.