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.
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.
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