Six volunteers (mean age=25.7±1.7, height=173±1.9 and weight=63.4±2.3kg) participated in agraded exercise test and one hour of basic form of ChunDoSunBup (CDSB) Qi-training toinvestigate the cardiorespiratory responses and exercise intensity of Qi-training, a Koreantraditional psychosomatic training. In the maximal exercise, the trainee showed 96.2±8.89 l/minin ventilation (E), 46.0±4.4 in breath frequency (BF), 1.31±0.05 in respiratory exchange ratio(RER), 180.7±3.0 in heart rate (HR), and 2.6±1.1l/min or 40.7±2.3 ml/kg/ml in oxygenconsumption (O2). Qi-training induced significant changes in BF, RER, HR, and O2. Theexercise intensity of Qi-training were 42.3%, 46.9% and 38.7% of HRmax during the soundexercise, slow motion (haeng-gong) and meditation respectively and the average was 46.2% ofHRmax. We conclude that Qi-training is an aerobic exercise of a light (mild) intensity exercise,and it leads to decrease the metabolic rate in the trainee by breathing efficiently and relaxingthem. In addition, Qi-training may affect cardiorespiratory function of BF, RER, HR and O2maxin trainees.