التفاصيل البيبلوغرافية
| العنوان: |
Relationship between knee valgus, hip-muscle strength, and hip-muscle recruitment during a single-limb step-down. |
| المؤلفون: |
Hollman JH, Ginos BE, Kozuchowski J, Vaughn AS, Krause DA, Youdas JW |
| المصدر: |
Journal of Sport Rehabilitation; Feb2009, Vol. 18 Issue 1, p104-117, 14p |
| مستخلص: |
Context: Reduced strength and activation of hip muscles might correlate with increased weight-bearing knee valgus. Objective: To describe relationships among frontal-plane hip and knee angles, hip-muscle strength, and electromyographic (EMG) recruitment in women during a step-down. Design: Exploratory study. Setting: Laboratory. Participants: 20 healthy women 20 to 30 years of age. Interventions: Frontal-plane hip and knee angles were measured. Gluteus maximus and medius recruitment were examined with surface EMG. Hip-abduction and -externalrotation strength were quantified with handheld dynamometry. Main Outcome Measurements: The authors analyzed correlation coefficients between knee and hip angles, gluteus maximus and medius EMG, and hip-abduction and -external-rotation strength. Results: Hip-adduction angles (r = .755, P = .001), gluteus maximus EMG (r = r=-.451, P = .026), and hip-abduction strength (r = .455, P = .022) correlated with frontal-plane projections of knee valgus. Conclusions: Gluteus maximus recruitment might have greater association with reduced knee valgus in women than does external-rotation strength during step-down tasks. Gluteus medius strength might be associated with increased knee valgus. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
