Cardiovascular endurance is a component of physical fitness which plays great role during exercises. The primary purpose of this study was to evaluate the effects of selected types of aerobic exercise on enhancing cardiovascular endurance of students. The study was conducted to improve cardiovascular endurance performances on 30 male athletes of Dermot preparatory school of Grade 11 students. These thirty male students were assigned as one experimental group and their age ranges 18 and 19 years. All subjects participated in selected aerobic exercises for 8 weeks i.e., three days per week and 60 minutes duration per day. Pre-test, during training test and post training test were conducted on physical fitness variables such as step test and 12 minutes run. The data collected from subjects were analyzed by paired simple t-test to determine the differences between pre-test and post-test mean value results of the participants of the study. According to the findings of the study, step test 26.6 beats per minute mean differences. In twelve minutes run 271.16 meters increments data were observed. Therefore, the results obtained from the study indicate that there were significant improvements within 12 minutes run. However, in the case of steps test, a test result was decreased because of improvement in the performance. So, the findings of the study reveals different responsible bodies like coaches, sport commission office, education office, school principals and sport Science teachers should take considerable actions for the improvement of the Athletics proficiencies of the students as well as others youth.