Mouth-to-mouth rescue breathing is the quickest way to get oxygen within a person's lungs. Therefore, if you are not trained in emergency procedures, doctors recommend skipping mouth-to-mouth rescue breathing and proceeding directly to chest compression. The reason is which if you are distracted through trying to perform unfamiliar breathing techniques; valuable lifesaving minutes might be lost for the person who requires help. The most important thing you can do is to proceed directly to chest compression to move blood to vital organs, particularly the brain and heart. If you are trained in emergency procedures, it is significant to do both mouth-to-mouth rescue breathing and chest compression.