This study attempted to explore effects of circuit training program on selected physical fitnessrnvariables of female students. Purposive sampling technique was used to select 24 novice femalernstudents on intervention and comparison group aged15 to 16 years from grade 9 students. Thernmain objective of the study was to investigate the effect of circuit training program on selectedrnphysical fitness variables of Alibo high School female students Horo Guduru Wollega Zone inrnOromia Regional state. Those subjects under this study took part in experimental design prernand post test on both group from October 1/02/2015 to December 30/04/ 2016, 2 days per weekrnfor 3 months and 40 minutes prerecession. The physical fitness variables selected for the studyrnwere: cardio respiratory endurance (1.6 km run in minutes), muscular endurance (sit-upsrnreps/60 seconds), muscular strength (modified push-ups reps/30 seconds), power (standing longrnjump in meter) and agility (4x10 m shuttle run in seconds).Data were analyzed by using SPSSrnpaired samples t- test with pair wise comparison of means at 95% confidence interval. Thernresults indicated that there were significantly improvements in performance on selectedrnphysical fitness variables due to the effects of circuit training with active rest (p < 0.05).Thisrnstudy confirmed that circuit training with active rest was significant to improve the physicalrnfitness variables. The main finding of the study was novice female students have discoveredrnpositive outcomes towards physical fitness variables. The study also illustrates that health andrnfitness level of participants can be improved as a result of circuit training program.rnKey words: circuit training on: cardio respiratory endurance, muscular strength, muscularrnendurance, power and agility