[Effect of chronoexercise on circadian expression of clock genes].
To investigate the molecular biological mechanism of chronoexercise regulating circadian. Expressions of mPer1 and mPer2 in the diencephalon of golden hamster were determined 2 hours after acute exhaustive exercise (circadian time 6) by quantitative RT-PCR. Chronoexercise at CT6 significantly decreased expressions of mPer1 and mPer2 in the diencephalon of golden hamster. Inhibitory effect of chronoexercise on Per1 and Per2 mRNA levels in the diencephalon of golden hamster at CT6 may be achieved transcription-translation-based autoregulatory negative feedback loop.