Methods: The study was conducted using a quasi- experimental design for eight weeks. Thirty female students were selected as subjects of this study and they were selected using s lottery system of simple random methods. The measure of muscular endurance and muscular strength of the participants of the study was recorded instantly preceding and following the 8-week of circuit training intervention. The study was established the mean along with standard deviation using a paired sample T-test. Statistical Package for the Social Science (SPSS) was used to carry out all of the statistical data analysis. The statistical significance level was set at p < 0.05.Result: The study was discovered that circuit training experiences a significant change on leg explosive strength (35.67±3.84 and 38.60±3.24 squat) of circuit group but not (37.67±3.28 and 37.87±3.38 squat) control group. It also improves abdominal muscle endurance (18.64 ± 2.846 and 22.93±4.873 sit ups in 1 minute) of experimental group but not (21.11±6.249 and 21.58±5.610 sit up in 1 minute) control group. It also improves core muscle strength and endurance (76.20±32.00 and 79.87±34.90 second) of circuit group but not (76.20±32.005 and 76.36±31.87 second) control group.Conclusion: The results of this study reveal that a circuit training intervention was successfully improving muscular endurance and muscular strength of female students. This could support school teachers in specific physical education teachers to arrange circuit training schedule in the schools to improve schoolchildren’s muscular endurance and muscular strength.

Keywords : Circuit Training, Muscular Fitness, Physical Education, and Physical Fitness.