Each participant performed CPR on a manikin with kneeling, standing on a taboret, and standing postures in one week apart, and the sequence of postures was assigned through a randomization process.

• 每位受测者以随机决定，分别以跪坐、站立于小板凳以及站立三种不同的急救姿势在假人身上操作心肺复苏术，每次操作间隔一个星期。