Final answer:
The recommended depth of chest compressions during CPR is at least 5 cm deep, approximately one-third of the chest's anterior-posterior diameter.
Step-by-step explanation:
The recommended depth of chest compressions during CPR (cardiopulmonary resuscitation) is a crucial part of emergency response to a cardiac arrest. Current standards call for compression of the chest to be at least 5 cm deep, which can be equated to roughly one-third of the anterior-posterior diameter of the chest. This depth of compression is essential to adequately compress the heart between the sternum and the spine, pushing blood through the pulmonary and systemic circuits and maintaining vital organ perfusion.