Muscles spanning the upper back, the middle trapezius and rhomboids, pull the shoulder blades towards the spine to open the front of the chest.
中斜方肌和菱形肌(贯穿上背部的肌肉)将肩胛骨向脊柱的方向拉，从而打开胸廓。
Inhale and lift upper back using back muscles while moving forearms outward until parallel.
吸气并用背部的肌肉抬起上背部，同时移动前臂向外直到平行。
Inhale and lift upper back using back muscles while moving forearms outward until parallel.
吸气并用背部的肌肉抬起上背部，同时移动前臂向外直到平行。
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