"It's not enough to just sit up straight if your core muscles are weak," said Dr. Praveen Mummaneni.
普拉文·莫曼奈尼博士说：“如果你的核心肌群比较虚弱，那么仅仅坐直是不够的。”
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"It's not enough to just sit up straight if your core muscles are weak," said Dr. Praveen Mummaneni, a spine surgeon at the University of California, San Francisco.