Hormonal

Acute resistance exercise directly modulates circadian clock gene expression (Cry1, Per2, Bmal1) in human skeletal muscle, suggesting peripheral muscle clocks can respond independently of the central suprachiasmatic nucleus.

Performing resistance exercise can directly reset the internal biological clocks within your muscles. This happens at the gene level (specifically Cry1, Per2, and Bmal1) within 6 hours of a workout. This suggests that exercise is a potent tool for aligning your body's peripheral rhythms, potentially aiding sleep and metabolic health, even without changes to your central sleep-wake cycle.