The purpose of the study was to find out the effect of isolated and combined training of aerobic and yoga on hemoglobin among school students. To achieve this purpose of the study, sixty female students were selected as subjects who were from the INDUS International School, Bangalore. The selected subjects were aged between 15 to 18 years. They were divided into four equal groups of fifteen each, Group I underwent aerobic training, Group II underwent yogic training, Group III underwent combined training and Group IV acted as control that did not participate in any special training apart from their regular curricular activities. The subjects were tested on selected criterion variable such as hemoglobin prior to and immediately after the training period. The selected criterion variable such as hemoglobin was determined through blood samples analyzed through laboratory tests. The analysis of covariance (ANCOVA) was used to find out the significant differences if any, between the experimental group and control group on selected criterion variable. In all the cases, 0.05 level of confidence was fixed to test the significance, which was considered as an appropriate. The result of the present study has revealed that there was a significant difference among the experimental and control group on hemoglobin.