This research is motivated by the declining level of physical fitness possessed by students at SMA Negeri 8 Kendari. This study aims to determine the effect of 2012 physical fitness exercise on increasing students' physical fitness. In this study using the experimental method. Experimental research is research that aims to determine the cause and effect that occurs in research subjects after being given an action or treatment. In this research using a quasi-experimental method, the design of this research is One Group Pretest-Posttest Design. This research was conducted for 9 weeks with a frequency of exercise 3 times a week, namely on Thursday, Friday and Saturday. The population in this study were all seventh grade students of SMA Negeri 8 Kendari, totaling 98 students and a sample of 10 students taken by random sampling technique, which is a sampling technique that provides equal opportunities for students to become samples in this study. Statistical analysis using IBM SPSS version 25 to look for descriptive data (mean, standard deviation), normality test (shapiro-wilk) and homogeneity (levene test) and in this study using t-test and paired sample t-test for hypothesis testing in research and for the significance level using 0.05. The findings of this study indicate that the post-test value by calculating t-count = 6.474> t-table = 1.833 and 0.006 <0.05. This means that there is an effect of the consequences of 2012 physical fitness exercise on increasing the physical fitness of the students. Thus, in this study, it was confirmed that the 2012 physical fitness training was positively proven to increase the physical fitness of students from low to high. This research has implications for providing information for lecturers, teachers or instructors regarding the importance of using a 2012 physical fitness training for students who have a relatively low level of physical fitness.