<![CDATA[Background: Student is an adult period which is generally in the age range of 18-25 years, at that time students have responsibilities for their development, including having responsibilities for their lives to enter adulthood. Cardiorespiratory fitness is an indicator to measure a person's health status because the heart and lungs are important organs that determine life. Several factors, including physical activity, smoking habits can affect a person's cardiorespiratory fitness. Objective: To find out whether there is a relationship between smoking habits and physical activity on cardiorespiratory fitness in students in the city of Surakarta. Methods:This study uses an analytical observation method by sampling using cluster random sampling with a sample of 100 subjects. The research instrument used the brikman index questionnaire, IPAQ and Harvard Step Test. Data analysis using Chi square and multiple regression. Results: The results of this study indicate that there is a significant relationship between smoking habits and physical activity on cardiorespiratory fitness with a value (p = 0.000) and the results obtained that the F test can be seen that the independent variables simultaneously influence the dependent variable, testing the hypothesis using the T test shows that from the independent variable is proven to have a significant effect on the dependent variable and the R2 value is 0.100 or 10%. This shows that Cardiorespiratory Fitness can be influenced by 10% by the independent variables namely Smoking Habits and Physical Activity. Meanwhile, 90% of Cardiorespiratory Fitness is influenced by other variables.Conclusion : There was a significant relationship between smoking habits and physical activity on cardiorespiratory fitness in students in the city of Surakarta. Keywords: Students, Smooking habits, Physical activity and cardiorespiratory fitness.]]>
