当手处于放松位置时，每个关节都在它们的可能的伸展或者弯曲的限制中的某一点。

When your hand is in a relaxed position, each of the joints are at a point about midway between the limits of their possible extension and flexation.

youdao

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.

youdao

保持脊柱处于中正、放松的位置，然后向右转头，并且使目光越过右肩，凝视远处。

With your spine in a neutral, relaxed position, rotate your head to the right, gazing over your right shoulder.

youdao