Table 1. Comparison of pre-test and post-test serotonin and cortisol levels in each group (Mean±SD).

		Pre-test	Post-test
HR	Serotonin (ug/L)	125.8±39.1	132.4±39.1*
	Cortisol (ug/dL)	11.7±4.1	11.0±3.9*
CR	Serotonin (ug/L)	124.0±36.8	125.7±34.9
	Cortisol (ug/dL)	11.5±3.3	11.6±3.9

*p<0.05. HR: horse riding group; CR: control group