Femoroacetabular impingement syndrome (FAIS) consists of abnormal hip joint morphology and pain during activities of daily living. Abnormal gait mechanics and potentially abnormal muscle forces within FAI patients leads to articular cartilage damage. Therefore, there is a necessity to understand the effects of FAI on hip joint muscle forces during gait and the link between muscle forces, patient reported outcomes (PRO) and articular cartilage health. The purposes of this study were to assess: (1) hip muscle forces between FAI patients and healthy controls and (2) the associations between hip muscle forces with PRO and cartilage composition (T1ρ/T2 mapping) within FAI patients. Musculoskeletal simulations were used to estimate peak muscle forces during the stance phase of gait in 24 FAI patients and 24 healthy controls. Compared to controls, FAI patients ambulated with lower vasti (30% body-weight, p = 0.01) and higher sartorius (4.0% body-weight, p < 0.01) forces. Within FAI patients, lower peak gluteus medius, gluteus minimus, sartorius and iliopsoas forces were associated with worse hip joint pain and function (R = 0.43–0.70, p = 0–0.04), while lower muscle forces were associated with increased T1ρ and T2 values (i.e. altered cartilage composition) within the hip joint cartilage (R = −0.44 to −0.58, p = 0.006–0.05). Although FAI patients demonstrate abnormal muscle forces, it is unknown whether or not these altered muscle force patterns are associated with pain avoidance or weak musculature. Further investigation is required in order to better understand the effects of FAI on hip joint muscle forces and the associations with hip joint cartilage degeneration.
|Number of pages||9|
|Journal||Journal of Biomechanics|
|State||Published - Feb 14 2019|
Bibliographical noteFunding Information:
Research reported in this publication was supported by the National Institute of Arthritis and Musculoskeletal and Skin Diseases of the National Institutes of Health under Award Numbers P50 AR060752 , R01 AR069006 , F32 AR069458 , K99 AR070902 , K24 AR072133 as well as YIG-2016 from the American Orthopaedic Society for Sports Medicine (AOSSM). The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health or AOSSM.
© 2018 Elsevier Ltd
- Femoroacetabular impingement
- Hip joint
- Muscle force
- Musculoskeletal simulation
- T/T mapping
ASJC Scopus subject areas
- Orthopedics and Sports Medicine
- Biomedical Engineering