[Effect of chronoexercise on circadian expression of clock genes].

Objective: To investigate the molecular biological mechanism of chronoexercise regulating circadian.

Methods: 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.

Results: Chronoexercise at CT6 significantly decreased expressions of mPer1 and mPer2 in the diencephalon of golden hamster.

[An association study between the insertion/deletion polymorphism of angiotensin I converting enzyme gene and human speed endurance].

This study was conducted to research the association between the insertion/deletion (I/D) polymorphism of Angiotensin I converting enzyme (ACE) gene and human speed endurance. Fourty subjects of Han nationality, healthy, with similar sports history were included. The I/D polymorphism of ACE gene was detected by polymerase chain reaction (PCR).