SUMMARY
Introduction: Low back pain (LBP) is a complaint that often arises related to work and activities that can be experienced by anyone. Aim; know the relationship between posture and sitting time with complaints of low back pain (LBP) in students. Methods: A cross-sectional observational study was conducted and a total of 198 medical students. Data collection using a questionnaire, results: showed a significant relationship between head posture while sitting (p = 0.024), body mass index (p = 0.000), smoking habits (p = 0.003) and complaints of low back pain (LBP). There is no relationship between posture and knee joints when sitting, length of sitting, gender, and age with complaints of low back pain (LBP). Conclusion: There is a significant relationship between head posture (lower or upper) when sitting, body mass index (BMI), and smoking habits with complaints of low back pain (LBP).