短语词组短语Feet to Back Stretch 伸足背后伸Upper -Back Stretch 上背部伸展upper back stretch 上背伸展abdomen back stretch 腹背部训练cable back stretch 颈后拉弹簧back -edge stretch 扇状变形Rubber -ball back stretch 巧用橡胶球缓解背疼 返回 back stretch