MECHANICAL RESPONSES TO HIP VERSUS KNEE INDUCED MUSCLE FATIGUE IN PATELLOFEMORAL PAIN SYNDROME | ||
| Benha International Journal of Physical Therapy | ||
| Articles in Press, Accepted Manuscript, Available Online from 23 October 2025 PDF (405.05 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/bijpt.2025.413643.1111 | ||
| Authors | ||
| Ghada Abdel Moneim Mohamed1; Eman Ahmed Ahmed* 2; Manal Sami Ibrahim1 | ||
| 1Lecturer in the department of Biomechanics and Ergonomics, Faculty of physical therapy, Cairo University | ||
| 2Assistant Lecturer in the department of Biomechanics and Ergonomics, Faculty of physical therapy, Cairo University | ||
| Abstract | ||
| Background: Impaired muscular endurance is recognized as a significant factor contributing to the development of patellofemoral pain syndrome (PFPS). Despite its importance, there remains a lack of comprehensive understanding regarding the specific impacts of muscle fatigue on hip and knee function in patients with PFPS. Purpose: This study aimed to investigate the effects of induced fatigue in hip abductors and knee extensors on knee proprioception and hip and knee muscle strength in female patients with PFPS. Methods: Fifteen female patients participated in two testing sessions, spaced 3 days apart. Each session included an isokinetic fatigue protocol targeting the hip abductors and knee extensors. Pre- and post-fatigue measurements were conducted using an Isokinetic dynamometer. Results: The result demonstrated a significant decrease in knee muscle strength following hip abductor fatigue (p < 0.05). Following the hip fatigue protocol, knee proprioception showed impairment reflected by an increased knee absolute angular error (AAE). Although there was an increase of AAE, its value did not reach statistical significance (p = 0.07). Furthermore, no significant changes were noted in hip abductor peak torque after knee fatigue. Conclusion: These findings underscore the clinical importance of assessing and rehabilitating hip endurance in the management of patellofemoral pain syndrome. By addressing hip muscle fatigue, clinicians can potentially improve outcomes and reduce symptoms associated with PFPS. | ||
| Keywords | ||
| Muscle fatigue; proprioception; patellofemoral pain; knee muscle performance | ||
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