فهرست نشریات علمی دسترسی آزاد ایران

 Background and Objectives: Low back pain (LBP) subgroups exhibit distinct movement patterns. This study compared lumbar and hip kinematics during forward bending in two LBP subgroups—active extension pattern (AEP) and flexion pattern (FP)—versus healthy controls, using the O'Sullivan Classification System.   Methods: In this cross-sectional study, 32 participants (11 AEP, 10 FP, 11 controls) were assessed. LBP subgroups were classified by physiotherapists based on pain patterns and movement behaviors. Kinematic data (lumbar/hip range of motion [ROM], lumbar-to-hip [L/H] ratios, and lumbar angles) were captured via 3D motion analysis. Statistical comparisons used ANOVA and LSD tests (P<0.05).   Results: The AEP group showed greater total forward-bending ROM (P=0.039) and larger lumbar ROM (P=0.021) than controls. Significant differences in initial (P=0.005) and end-range lumbar angles (P=0.054) were observed between AEP and controls. No group differences were found in L/H ratios across movement intervals.   Conclusion: This study highlights the importance of subgrouping LBP patients based on movement and postural patterns, as identified by the O'Sullivan Classification System. AEP patients displayed unique kinematics, including increased lumbar mobility and preserved lordosis during bending, unlike FP patients and controls. Additionally, the study suggests that initial and end-range lumbar angles are more clinically useful than L/H motion ratios for differentiating LBP subgroups.