N a gymnastic exercise in which the trunk is bent backwards until the hands touch the floor 下腰
One should be comfortable in small, less challenging backbends before emphasizing bigger, more challenging ones.
小幅度、挑战性小的后弯，往往会比大幅度、挑战性大的后弯更容易让人感觉舒适。
Twists can prepare the trunk for backbends and forward bends, as well as balance the body after backbends and forward bends.
扭转体式能够活动躯干，为后弯与前屈做好准备，同时也能在后弯与前屈之后平衡身体。
And strengthening the muscles around the S-I joint so as to prevent future problems can be accomplished by practicing simple backbends and standing poses.
要防止疼痛再次打扰，还需要加强骶髂关节周围的肌肉力量，只需要简单的后仰和站立的体式。
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