Always, as with dumbbell rows, imagine your arms as only hooks that are connecting you to the weight and pull up by contracting the muscle;

当做哑铃动作时，也要将双手想像成连接你的身体与重物的钩子。

youdao

Kevorkian then hooks Youk to an EKG and injects muscle relaxant into Youk's arm to stop his breathing.

CNN: Kevorkian Case: Video of killing shown to jury