把大腿压向后，并拉长躯干前侧，通过胸骨的上端来上提。
Press the thighs back and lengthen the torso forward, lifting through the top of the sternum.
伴随着每次吸气胸骨向上提一点，把手指推向地板以帮助。
With every inhalation lift a little more through the sternum, pushing the fingers against the floor to help.
吸气，双手从脚上松开。胸骨上提。
Inhale, release your hands from your feet. Lift your sternum.
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