Svenningsen S, Terjesen T, Auflem M, Berg V
Department of Orthopaedics, Trondheim University Hospital, Norway.
Clin Orthop Relat Res. 1990 Feb(251):177-82.
In a selected population, from four years old up to adult age, the function of 1522 hips of 761 apparently normal subjects of both genders were studied to define: (1) the lower and upper limits of normal hip rotation; and (2) the frequency of in-toeing gait related to age and gender. Internal and external rotation were measured with the subject lying prone with flexed knees. Presence of in-toeing gait was noted. A significant reduction of internal rotation with age was found in both females and males. In all age groups, females had significantly higher range of internal rotation than males. External rotation did not show the same age and gender dependency. Sixteen percent of all subjects had an in-toeing gait. The frequency decreased from 30% in the four-year-old group to 4% in adults. The subjects with in-toeing had a significantly increased internal rotation and decreased external rotation.
在一个选定的人群中，年龄从4岁到成年，对761名明显正常的男女受试者的1522个髋关节功能进行了研究，以确定：（1）正常髋关节旋转的下限和上限；（2）与年龄和性别相关的内八字步态的频率。在内旋和外旋测量时，受试者俯卧，双膝屈曲。记录内八字步态的存在情况。发现无论男性还是女性，随着年龄增长内旋均显著降低。在所有年龄组中，女性的内旋范围均显著高于男性。外旋未表现出相同的年龄和性别依赖性。所有受试者中有16%存在内八字步态。该频率从4岁组的30%降至成年人的4%。有内八字步态的受试者内旋显著增加，外旋减少。
