At this elastic pulling status which guarantees the balance of the pulling strength on both sides, the waist is relaxed 在弹性牵引状态下能活动腰部，还能保证左右牵引力平衡，理顺肌纤维、筋膜、小关节囊，纠正腰椎后关节紊乱和腰椎间盘髓核的移位，从而达到保健和治疗的目的。