Methods Using the method of chronobiology, the effects of chronoexercise upon the circadian and amounts of neurotransmitters of gamma-aminobutyrate acid (GABA) and glycine acid (Gly) in the rat's diencephalon were studied in this paper. Results The neurotransmitters revealed a significant circadian and the chronoexercise could change both the amounts and circadian of the transmitters. The change in circadian showed a shift of phase of transmitters' peak values and the amount of the transmitters displayed a ...