不标准。肩和胸要继续打开，胸上提。后弯的潜在危险是腰间盘问题。如果肩胸跨都紧，势必在腰弯折，这是要避免的。

来源: lawattaction 于 2019-05-02 10:09:33 [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.