Abstract: This study examined the prediction of self-efficacy and self-esteem on exercise identity of the post graduate students of university of Ibadan, Oyo state. The population comprised all post graduate students of university of Ibadan. Six faculties were sampled using fishbowl with replacement sapling techniques, and a total of 300 respondents were randomly selected to participate in the study. The socio-demographic characteristic of the respondents showed that 62(20.7%) were within the range of 20-24 years, 157(52.3%)were within 25-29 years, 54(18.0%) were within 30-34 years, 20(6.7%)were within 35-39, years and 7(0.3%) were within 40 and above .237(79%) were singles, 62(20.7%) were married and 1(0.3%) was divorced. 248(82%) were Christians, 48(16%) were Muslims and 4(1.3%) were traditional. 119(39.7%) stayed in school halls while 181(60.3%) stayed outside campus. A standardized questionnaire of self efficacy and a modified standardized questionnaire of self esteem were used to generate data. Descriptive statistic of frequency counts , percentages, mean, standard deviation were used to analyzed demographics data while inferential statistics of Pearson Product Moment Correlation and multiple regression were used to test the formulated hypotheses at a =0.05 alpha level. Three research hypotheses were raised to guide the study, the result indicated that the attitude and exercise behavior of the post graduate students of university of Ibadan determines their exercise identity, but poor self-efficacy and self esteem contributed to the low status of exercise identity of many post-graduate students of university of Ibadan. The findings revealed that self-efficacy has a positive prediction on exercise identity of the postgraduate students of university of Ibadan(r=0.511, p< 0.05), self-esteem has effective impact on achievement of exercise identity of the post-graduate students of university of Ibadan (r=0.318, p<0.05). It is therefore recommended that; workshop and