This study aimed to examine the effect of a circuit training programme on Leg explosive strength of school students Meerut, Uttar Pradesh. To achieve the purpose of the study, the sixty (60) male students were selected who served as subjects and their age group was between 9 to 14 years. The selected subjects were divided into two groups i.e., experimental and control group. 30 male students were selected for each group as research subjects. The experimental group underwent through circuit training exercise consisted 8 station for 12 weeks. The control group was not given any training apart from their regular activates. The physiological variable which was examined during the study was Leg explosive strength. All the data which was collected before the training and after applied the training programme were examined by using dependent “t” test to find out the significant difference between the means of pre and post test score of experimental group after applied 12 weeks of circuit training. The level of confidence was fixed at 0.05. The obtained‘t’ score of Leg Explosive strength was found higher than the required table value 1.67 to be significant at 0.05 level of confidence at df 58. It shows that Post data score of school students of experimental group is found better than the Post data of control group of school students.