OBJECTIVE: To determine if females with hip abductor weakness are more likely to demonstrate greater knee abduction during the stance phase of running than a strong hip abductor group. STUDY DESIGN: Observational prospective study design. SETTING: University biomechanics laboratory. PARTICIPANTS: 15 females with weak hip abductors and 15 females with strong hip abductors. MAIN OUTCOME MEASURES: Group differences in lower extremity kinematics were analyzed using repeated measures ANOVA with one between factor of group and one within factor of position with a significance value of P < .05. RESULTS: The subjects with weak hip abductors demonstrated greater knee abduction during the stance phase of treadmill running than the strong group (P < .05). No other significant differences were found in the sagittal or frontal plane measurements of the hip, knee, or pelvis. CONCLUSIONS: Hip abductor weakness may influence knee abduction during the stance phase of running.
OBJECTIVE: To determine if females with hip abductor weakness are more likely to demonstrate greater knee abduction during the stance phase of running than a strong hip abductor group. STUDY DESIGN: Observational prospective study design. SETTING: University biomechanics laboratory. PARTICIPANTS: 15 females with weak hip abductors and 15 females with strong hip abductors. MAIN OUTCOME MEASURES: Group differences in lower extremity kinematics were analyzed using repeated measures ANOVA with one between factor of group and one within factor of position with a significance value of P < .05. RESULTS: The subjects with weak hip abductors demonstrated greater knee abduction during the stance phase of treadmill running than the strong group (P < .05). No other significant differences were found in the sagittal or frontal plane measurements of the hip, knee, or pelvis. CONCLUSIONS:Hip abductor weakness may influence knee abduction during the stance phase of running.
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