Good for you for going through training, regardless of whether it was a personal choice or a work requirement.
It was a work requirement.
But beyond that simple choice, being able to remember what you were taught is the most important thing. If you don't periodically refresh your memory, it becomes very easy to forget.
They gave us a book and a booklet (protocol) to put in the first aid kit. The trainer knew the pages by heart as if it was the bible. It was funny, he asked us to name a page and he would tell us exactly what was the subject at that particular page. He made many jokes.
It's even worse with all the movies and TV shows where 15 seconds of CPR, chest pounding, and yelling always bring the patient back.
I know. They emphasized this.
Thanks everyone for the replies.
Frankie