Without moving right arm, inhale and bend left elbow, curling dumbbell toward shoulder (not shown). Exhale and press dumbbell back to start position. Do just once.

• 保持右臂不动，吸气，弯曲左肘，朝肩部向内拉哑铃（无图示）。呼气，将哑铃推回到原来位置。只做一次。