Final answer:
Jacki is encouraging the process of overlearning by having the lifeguards practice CPR regularly to ensure the skill becomes automatic for effective and efficient real-life application.
Step-by-step explanation:
Jacki is encouraging the process of overlearning. Overlearning is the continued practice of a skill after proficiency has been achieved. This is to ensure that the skill becomes automatic and can be performed effectively and efficiently, without hesitation, when needed. In the context of CPR, it's crucial because CPR must be administered correctly and confidently to be effective, and the skills need to be ingrained enough to be performed under high-stress conditions where lives depend on swift and proper action. Inappropriate CPR technique can lead to severe injuries like broken ribs or even a broken sternum, and in the worst cases, it could be fatal if the xiphoid process is driven into the liver due to incorrect hand placement. Therefore, consistent practice on a mannequin and recertification are essential for lifeguards to maintain their CPR skills sharp.