Efficiency of chest compression during CPR affected millions of victims over the world. There are still no clear guidelines on kneeling posture that a rescuer should adopt in performing CPR. A self-controlled-repeated-measures design applied in this study. The efficiency of chest compression on a mannequin when three kneeling postures were adopted (farthest, self-adjusted, and nearest) was analysed. Eighteen participants with qualified first-aid certificate were recruited.
