Abstract：
INTRODUCTION:Several studies have investigated walking characteristics in hip dysplasia patients, but so far none have described all hip rotational degrees of freedom during the whole gait cycle. This descriptive study reports 3D joint angles and torques, and furthermore extends previous studies with muscle and joint contact forces in 32 hip dysplasia patients and 32 matching controls. METHODS:3D motion capture data from walking and standing trials were analysed. Hip, knee, ankle and pelvis angles were calculated with inverse kinematics for both standing and walking trials. Hip, knee and ankle torques were calculated with inverse dynamics, while hip muscle and joint contact forces were calculated with static optimisation for the walking trials. RESULTS:No differences were found between the two groups while standing. While walking, patients showed decreased hip extension, increased ankle pronation and increased hip abduction and external rotation torques. Furthermore, hip muscle forces were generally lower and shifted to more posteriorly situated muscles, while the hip joint contact force was lower and directed more superiorly. CONCLUSION:During walking, patients showed lower and more superiorly directed hip joint contact force, which might alleviate pain from an antero-superiorly degenerated joint.
journal_name
Gait Posturejournal_title
Gait & postureauthors
Skalshøi O,Iversen CH,Nielsen DB,Jacobsen J,Mechlenburg I,Søballe K,Sørensen Hdoi
10.1016/j.gaitpost.2015.08.008subject
Has Abstractpub_date
2015-10-01 00:00:00pages
529-33issue
4eissn
0966-6362issn
1879-2219pii
S0966-6362(15)00814-0journal_volume
42pub_type
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