Sedentary behavior and joint mobility in university students: a sex comparison

Background: University students are exposed to high levels of sedentary behavior (SB), which may negatively impact musculoskeletal health, including joint range of motion (ROM). However, evidence in young, healthy populations remains limited. Objective: To examine the relationship between SB and hip joint ROM in Chilean university students, with particular attention to sex differences. Methods: A cross-sectional study was conducted with 189 students (89 men, 100 women; mean age: 21.6 ± 2.4 years). SB was assessed using the short-form International Physical Activity Questionnaire, and hip ROM (flexion, extension, abduction) was measured with a digital goniometer under standardized conditions. Results: Mean SB was 691 ± 42.6 minutes/day, exceedingly commonly accepted sedentary thresholds. No significant correlations were found between SB and hip ROM. Women demonstrated significantly greater hip flexion and abduction ROM than men (p < 0.05), while no sex differences were observed in hip extension. Conclusion: Despite high levels of SB in this university population, no association with hip ROM was found. The observed sex differences in joint mobility align with known anatomical and behavioral variations. These findings highlight the need for longitudinal research using objective measures to better understand SB’s impact on joint health in young adults.