The purpose of this study was to determine the Effect of Addition of Physical Activity 2 Times a Week Through Self-Assignment Outside of Physical education learning Against the Level of Physical Fitness in students of SMAN 3 Banjarmasin. The method used in this study is the Experimental method, namely pre-Experimental Designs in the form of The One Group Pretest and Posttest Design, with a population of 565 people and a sample of 34 people. The instrument used to measure physical fitness as reflected by VO2max is to use a multistage fitness test (MFT) or Bleep Test, Nurhasan, (2007: 201). The sampling technique used in this study is a purposive sampling technique, which is a sampling technique with certain considerations, Sugiyono (2014: 126). The results of the statistical analysis with the t-test obtained Sig. (2-tailed) = 0,000 <0.05 thus the t-count was significant. Because the t-test is significant, the null hypothesis (Ho) is accepted stating that there is a difference between the initial test and the final test by providing additional physical activity twice a week through independent assignments outside of learning Physical education against Physical Fitness Levels at SMAN 3 Banjarmasin students. Conclusion: There is an effect of adding Physical Activity 2 times a week through independent assignments outside of learning. Physical education to improve Physical Fitness in students of SMAN 3 Banjarmasin.