How should a responder maintain proper body position while delivering chest compressions?

Maintaining proper body position while delivering chest compressions is crucial for both the effectiveness of the compressions and the safety of the responder. Keeping the shoulders directly over the hands ensures that the force of the compressions is effectively transmitted to the chest of the person in need of resuscitation. This alignment aids in maximizing the depth and speed of each compression, which is essential for maintaining blood flow to the brain and vital organs during a cardiac emergency.

Additionally, having the arms straight allows the responder to use their body weight to help with the compressions, reducing fatigue and optimizing the force applied. This technique is consistent with guidelines for high-quality CPR aimed at improving the chances of survival for the person receiving aid.

Other positions, such as leaning back while compressing or turning to the side, can reduce effectiveness and may even lead to injury for the responder or insufficient compressions for the patient. Bending fully at the knees can alter the angle of the compressions, making it more challenging to apply adequate force effectively. Therefore, the correct technique involves a strong, stable posture that ensures the responder can deliver high-quality chest compressions.