后背，双脚和肩膀。
这也就是说你的脖子和脊柱应该处于中正的位置，肩膀和躯干放松，膝盖弯曲呈90度角，双脚平放在地面上。
This means your neck and spine should be in a neutral position, shoulders and torso relaxed, knees bent at 90 degrees with both feet flat on the floor.
这个力量传递到肩膀和手臂，然后连接至双脚。
This force is transmitted to the shoulders and arms, and then connected to the feet.
应用推荐