FP14.4 Muscle Strength and Pelvic Alignment Patterns Differ Across Hip Pathologies: A Comparative DIERS Study

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ID: 331212
2026
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Abstract
Abstract ICLA14 - The Extra-Articular Masterclass: Endoscopic Repairs, Ischiofemoral Fixes, and Complex Alignment, Auditorium A (BMCC Level 1), October 9, 2026, 14:00 - 16:00 Background Hip-related disorders such as femoroacetabular impingement (FAI), hip osteoarthritis (OA), and greater trochanteric pain syndrome (GTPS) are associated with altered neuromuscular function and biomechanical adaptations. However, whether these conditions demonstrate distinct or shared patterns in muscle strength and pelvic alignment remains unclear. Purpose To compare pelvic parameters and hip-related muscle strength among individuals with FAI, hip OA, GTPS, and healthy controls. Methods A cross-sectional study was conducted including individuals diagnosed with femoroacetabular impingement (FAI; n=14), hip osteoarthritis (OA; n=23), and greater trochanteric pain syndrome (GTPS; n=18), along with age-matched healthy controls (n=46). Muscle strength of the hip and thigh musculature was measured using a digital handheld dynamometer (Lafayette). Group comparisons were performed using Kruskal-Wallis Test and Mann- Whitney U Test was used for pairwise group comparisons. Statistical significance was set at p<0.05. Results Gluteus medius muscle strength was significantly reduced in all patient groups compared to healthy controls (p≤0.01) Quadriceps strength was significantly lower in the FAI (p=0.04) and GTPS groups (p=0.04), while no difference was observed in the OA group (p≥0.05). Gluteus maximus weakness was identified only in individuals with hip OA (notably in females) (p=0.04). Lateral hamstring weakness was observed exclusively in the GTPS group (p≤0.01). Regarding pelvic parameters, pelvic obliquity was significantly different in the GTPS group (p≤0.01) compared to healthy controls, whereas sagittal imbalance was significantly increased only in the FAI group (p=0.03). Conclusion Distinct patterns of muscle weakness and pelvic alignment alterations were observed across hip pathologies. Although the importance and discriminative role of the gluteus medius in hip joint mechanics and pathology are well established, the presence of marked strength deficits across different hip conditions, along with accompanying muscle imbalances and compensatory mechanisms, leads to alterations in pelvic alignment, reflecting condition-specific biomechanical adaptations. These variations may also be influenced by differences in loading patterns and pathomechanical demands inherent to each condition. These findings highlight the importance of tailored rehabilitation strategies based on condition-specific neuromuscular and biomechanical profiles.
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Authors Esra Ateş Numanoğlu, Asude Arık, MSc Melike Naz Gürel PT, Gürsoy Coşkun
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Journal Journal of hip preservation surgery
Year 2026
DOI
10.1093/jhps/hnag043.108
URL
https://doi.org/10.1093/jhps/hnag043.108
Keywords Keywords not found

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