The primary aim of the research was to evaluate the impact of a core strength training intervention on specific physical fitness components in male U-17 volleyball players of Agut Sekela. This stud was carried out using an experimental design with one group pretest and posttest. Twenty subjects were participated in the study. For three months, the subjects were taken training for three days in a week. The study examined the following fitness variables: strength, speed, agility and power. The study was analysis by using SPSS software version 26. The collected data was analyzed the mean standard deviation and paired sample t-test. p<0.05 was taken as the significant level. The finding indicates that a significant mean power mean value of pre training test was47.55cm and post training test result was50.45cm.When we compare performance of individuals pretest result with post test result, the 2.90cm means difference was recorded at P=0.003. Speed mean value was decrease from 7.51sec to 7.33sec with 0.18sec mean difference at P=0.001. The negative mean difference value show that the time to cover from a given distance as a short paired of time. Strength mean value for standing long jump test before training was 4.86m and after training mean value was 4.92m. when we compare the mean value result of before training test with the mean value result after 12 week exercise training program, the mean difference value increased by 0.059cm at P=0.002 and agility mean value was decrease from 16.36sec to 16.29sec with 0.07sec mean difference at P=0.001 were observed following the three months of core strength training intervention. In summary: power, agility, speed and strength were significantly improved after three months of core strength training and the null hypothesis were rejected at P<0.05. The athletes agility, speed, power, and strength performance can all enhanced if the coach incorporate core strength training exercise in to their training session.