When performing CPR, how should breaths be administered?

When administering breaths during CPR, the best practice is to deliver each breath over the duration of one second. This approach ensures that the breaths are effective while allowing enough time for the chest to rise, which indicates proper ventilation. Each breath should be given after every 30 chest compressions in adults, aligning with the recommended compression-to-breath ratio.

The timing of one second per breath helps prevent hyperventilation and allows for sufficient air exchange in the person receiving CPR. Properly timed breaths can significantly aid in maintaining oxygenation until advanced medical assistance arrives. It's critical to prioritize a steady rhythm during CPR to optimize the chances of survival for the victim.