March 23, 2026Trends in Endocrinology and Metabolism2 citationsOpen Access
View Full PaperExercise timing and circadian regulation of metabolism in type 2 diabetes
Key Points
- Investigate the impact of exercise timing on metabolic regulation in individuals with type 2 diabetes.
- Explored the effects of morning, afternoon, and evening exercise on glycemic control and insulin sensitivity in type 2 diabetes individuals.
- Assessed the relationship between exercise timing and circadian rhythms in metabolism and hormone secretion.
- Analyzed the influence of exercise intensity on metabolic outcomes.
- Afternoon and evening exercise led to greater improvements in glycemic control compared to morning exercise.
- Insulin sensitivity increased more significantly with exercise performed later in the day.
- Optimal exercise timing may help realign circadian rhythms and improve metabolic function in type 2 diabetes.
Abstract
The circadian system regulates daily rhythms in metabolism and hormone secretion; however, in type 2 diabetes, disrupted clock gene oscillations in skeletal muscle impair metabolic regulation. Insulin resistance, mitochondrial dysfunction, and chronic inflammation contribute to this circadian misalignment. Exercise can restore circadian rhythms, yet optimal timing has only recently been explored. In individuals with type 2 diabetes, afternoon and evening exercise yield greater improvements in glycemic control and insulin sensitivity compared with morning exercise, with intensity appearing to influence these effects. Thus, appropriately timed exercise may help correct circadian disruption and glucose dysregulation in type 2 diabetes. Nonetheless, further research is needed to elucidate the underlying mechanisms of exercise timing effects and establish evidence-based recommendations for clinical practice.