The purpose of this study is to inestigate model to improvement of cardiovascular endurance by using step ping box and to provide these information to the obese & nonobese persons. The subjects for this study consist of bese(OTG : 6persons) and nonobese training groups(NOTG : 6 persons). They are from 23 to 26 ages. who are similar to the variable control. The OTG were decided higher than 50% obesity percent by adjudication fomular of obesity and NOTG were derided lower than 5%. The subjects of obese & nonobese training groups was to establishment of loads among stepping box heights(30㎝. 35㎝. 40㎝. 45㎝. 50㎝. 55㎝, 60㎝) by Latin-Square method. They were tested first times by 50㎝-stepping box test before training, second times after 4weeks training. and third times after 8weeks training to see changes of heart rate(rest, during exercise, recovery) by using IXPE 3000 Training System. The analyzed and compared changes of heart rate after stepping box training for 8weeks by using loads of stepping box programs 〔5times/week, 4sets/day. 5min/set, rest : 3min/set. 1 week : 30㎝, 2week : 35㎝. 3week 40㎝, 4week : 45㎝. 5week : 50㎝, 6week : 55㎝. 7week : 60㎝. 8week : 60㎝(5 set/day)〕. The results are as follows: 1. Rest Heart Rate In the OTG showed significantly after 4week & after 8week training than before training at P<0.01, and after 8week than after weeks at P<0.01. while in the NOTG was showed significantly after 4week than after before training & after 8week than after 4weeks training at p<0.05, and after 8week than before training at P<0.05. Trend analysis in the OTG & NOTG was changed linear trend with heart rate and periods of training at p<0.001. The comparison between OTG & NOTG showed significantly OTG than NOTG at P<0.001. 2. Heart Rate during Exercise In the OTG & NOTG showed significantly after 4week & 8week training than before training, and after 8week than after 4weeks training at p<0.01. Trend analysis in the OTG & NOTG was changed linear trend with heart rate and periods of training(OTG:P<0.001, NOTG:P<0.05). The comparison between OTG & NOTG showed significantly OTG than NOTG at P<0.001. 3. Recovery Heart Rate In the OTG was showed significantly after 4week & 8week training than before training at P<0.001, and after 8week than after 4week training at p<0.05, but in the NOTG was showed significantly after 8week than before training at p<0.05, while after 4week than before training and after 8week than 4week training are not significant. Trend analysis in the OTG & NOTG was changed linear trend with heart rate and periods of training(OTG p<0.001, NOTG:p<0.05). The comparison between OTG & NOTG appeared significantly OTG than NOTG at P<0.001.