Sit tall with legs extended, arms holding straps at shoulder height.
Start with arms straight, palms facing up, shoulders relaxed.
Bend elbows, curling hands toward shoulders without moving torso.
Extend arms slowly, maintaining control and constant tension on straps.
背部划船准备 坐姿二头肌弯举 运动指南 - 二头肌 锻炼 | MuscleWiki