This study is to identify the effect of dance sports participation on the thigh strength and artery blood flow velocity in middle-aged women . It was measured to muscle strength by biodex of the isokinetic device and the subclavian artery blood flow velocity by ultrasound doppler in before and after dance sports participation to target general middle-aged women consisting of the experimental group(n=10) and control group(n=10). As a result, It showed significantly(p<.001) a higher increase to experiment group of the extensor(23.7%) and flexor(31.9%) exerted in 60o/sec in the case of thigh strength. But, there was no change in the control group. Also, the case of thigh strength exerted in angular velocity 180o/sec significantly a higher increased(p<.001) to experiment group of extensor(23.0%) and flexor(44.0%) after the dance sport participation. But, there was no change in the control group. Artery blood flow velocity, after exercise was no significant difference appeared the experiment group's peak blood velocity(-0.57%), mean blood velocity(-9.73%) showed a significant reduction(p<.01). Due to these results, It were identified to the easing of arteries blood velocity changes close to the heart and improvement the muscle strength of the thigh. Therefore, when looking at some improvement of the arterial vascular system in accordance with the functional adaptation of the heart muscle and the activity of muscle function due to the high frequency of use of thigh, in middle-aged women, the ongoing dance sport participation are presented effective exercise program in cardiovascular capacity cultured and improved in thigh muscle strength.