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ABSTRACT  Objective: To verify the influence of sedentary behavior and physical activity on the prevalence and situation of low back pain in medical students at a higher education institution.  Methods: Cross-sectional study with a quantitative approach, conducted with 220 students. Data were collected between January and February 2021, using the Roland-Morris Disability Questionnaire. Data were analyzed using the Statistical Package for the Social Sciences Program. Values of p ≤ 0.05 were accepted as statistically significant.  Results: Sixty-five percent of the participants were female, the average student age was 24.19 years, and a predominance of students were in the clinical cycle (60.9%). Of the total sample, 75.9% (n=167) stated that they performed physical activities and 28.2% (n=62) responded that they spend between 7-10 hours sitting studying. The prevalence of low back pain was high (84.1%; n=185), however, only 1.5% (n=3) had scores indicative of functional disability. Women (Mean=5.07, SD=0.35) had greater functional disability than men (Mean=3.33, SD=0.35; p=0.008). Sedentary students had greater disability (Mean=5.79, SD=4.55) than active students (Mean=4.04, SD=3.62; p=0.007); individuals who spent more than 7 hours a day sitting also had higher scores (p=0.02).  Conclusion: The findings indicated a significant self-reported prevalence of low back pain among medical students, with greater functional disability in females, sedentary individuals, and those who sat for more than 7 hours a day.  Level of Evidence II; Cross-sectional study .

INFLUENCE OF PHYSICAL ACTIVITY AND TIME IN THE SITTING POSITION ON THE CONDITION OF LOW BACK PAIN AMONG UNIVERSITY STUDENTS