Abstract
Ehlers-Danlos syndrome (EDS) is a clinically and genetically heterogeneous group of inherited connective tissue disorders characterised by joint hypermobility, skin hyperextensibility and tissue fragility. It has recently been shown that muscle weakness occurs frequently in EDS, and that fatigue is a common and clinically important symptom. The aim of this study was to investigate the relationship between fatigue severity and the gait pattern using 3D Gait Analysis (GA). Eleven individuals with Joint Hypermobility Syndrome/Ehlers-Danlos Syndrome Hypermobility type (JHS/EDS-HT) were investigated using muscle strength measured with standardised questionnaire measuring fatigue (Fatigue Severity Scale, FSS) and quantitative 3D GA. Our data showed that FSS value well correlated with the peak of vertical component of ground reaction force (r=-0.66, p<0.05). The negative correlation gives evidence that the higher the fatigue is the more reduced force is during gait. Our results showed that the ground reaction force has been applied as a functional evaluation score for detecting pathology in gait of JHS/EDS-HT participants and the found correlation between vertical force and fatigue demonstrated that muscle fatigue may be associated with a loss of proprioceptive acuity in lower limb muscles.
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