Root mean square emg amplitude in the flat , long lordosis , short lordosis , and slump sitting postures were normalized to maximal voluntary contraction , and also to the peak activity across the sitting postures .
将平直位、长前凸、短前凸和突然坐下时的均方根肌电幅值标准化至最大随意收缩及坐下时的峰活动。
The female mouse is then three times more likely to engage in what 's called lordosis behavior , a posture shown by many animals in heat in which they thrust their rumps and tails upward .