Németh G, Ekholm J, Arborelius U P
Scand J Rehabil Med. 1984;16(3):103-11.
The load on the hip joint during lifting was studied. Healthy subjects lifted a 12.8 kg box from floor to table level with straight and flexed knees in four different ways. The loading moment of force about the bilateral hip axis was calculated by means of a computerized static sagittal plane model. The highest load moment, 124 Nm, occurred initially in the straight knee lift and the compressive joint reaction force was 2.7 times body-weight. The lowest load moment, 82 Nm, occurred in the flexed knee lift with the burden moved close to the trunk, the compressive force was 3.2 X bw. The load moment was also discussed in relation to the strength capability. The EMG levels of seven different hip muscles were normalized and expressed as a percentage of the recorded level of each muscle group during an isometric maximum voluntary contraction. The initial activity in the hamstrings was higher in the straight knee lift compared to flexed knees. The gluteus maximus was activated to a moderate level.
研究了提举过程中髋关节的负荷。健康受试者以四种不同方式，在膝关节伸直和屈曲状态下，将一个12.8千克的箱子从地面举到桌面高度。通过计算机化的静态矢状面模型计算双侧髋关节轴上的加载力矩。最高负荷力矩为124牛米，最初出现在直膝提举时，关节压缩反作用力为体重的2.7倍。最低负荷力矩为82牛米，出现在屈膝提举且重物靠近躯干时，压缩力为体重的3.2倍。还讨论了负荷力矩与力量能力的关系。对七块不同髋部肌肉的肌电图水平进行了标准化处理，并表示为等长最大自主收缩期间每个肌肉群记录水平的百分比。与屈膝提举相比，直膝提举时腘绳肌的初始活动更高。臀大肌被激活到中等水平。
