The purpose of this study was to determine the effect of a combination of intermittent aerobic exercise and unsupervised hypocaloric diet on body composition, cardiovascular function, and some cardiovascular risk factors in obese schoolgirls. Nine subjects were volunteered as participants. The program lasted 14 weeks and consited of 3∼5 days/week supervised aerobic intermittent exercise (HR relative to VT) with an unsupervised diet(mean 1,740 ㎉/day). The program resulted in a mean decrease in body weight of 3.0㎏ for the Ex. group(p>0.05). Mean(±SD) relative body fat decreased from 37.2±2.7 to 28.6±2.1%(p<0.05). Cardiovascular function as evidenced by both V˙O₂@V˙T and VO₂max, increased 18.9%, 10.1% respectively. Triglyceride significantly dropped from a mean value of 190.6±79.3 to 139.8±52.0㎎/dl(p<0.05). HDLC increased from 32.2±3.3 to 3.9.4±2.9㎎/dl(p<0.05). It was conclude that a combination of supervised aerobic intermittent exercise plus unsupervised diet can favorably improve body composition, cardiovascular function and cardiovascular risk factors.