由于AS典型的临床特征，一直以来锻炼的焦点都在维持和提高脊椎和胸椎的柔韧性上。

Due to the typical clinical features of as, the main focus for exercising has traditionally been improvement or maintenance of the spinal and thoracic flexibility.

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这三个力系对脊椎起到牵引和固定的作用，使脊柱具有弹性和柔韧性，使人们可以做到正常的颈弯，胸弯，腰弯。

The three force system of the spine and fixed to play the role of traction, so that the spine flexible and flexibility, so that people can do the normal cervical curve, thoracic curve, lumbar curve.

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这三个力系对脊椎起到牵引和固定的作用，使脊柱具有弹性和柔韧性，使人们可以做到正常的颈弯，胸弯，腰弯。

The three force system of the spine and fixed to play the role of traction, so that the spine flexible and flexibility, so that people can do the normal cervical curve, thoracic curve, lumbar curve.

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