The Present Study Has Been Undertaken By the Researcher to Know the Effect of Core Specific Fitness Training Program on Muscular Endurance and Flexibility of School Going Children. to Get the Answers to the Questions, the Researcher Has Planned a Very Scientific Core Specific Fitness Training Program For the Implementation. the Researcher Has Selected a Total of 40 Participants Whose Age Ranged Between 15 to 18 Years. the Participants Were Divided on Control and Experimental Group Having 20 Members Each. All the Participants Were School Going Children and Regularly Participated In Physical Activity Classes. the Training of the Participants Was Conducted For 12 Weeks For 4 Days a Week. For the Data Analysis Ancova Was Used After Applying All the Required Assumption Statistics on the Data Collected. the Data Was Collected Pre and Post the Treatment Given. the Experimental Group Has Received the Planned Training Program Whereas the Control Group Did Not Get any Training Program. the Results of the Study Have Shown the Positive and Significant Impact of Core Specific Training Program on the Muscular Endurance and Flexibility on the School Going Children.