ems

Not a big fan of this blanket sentiment.

It's important to note that it absolutely is NOT necessary to hear things "pop" or "break" to deliver effective CPR. It's a common occurrence and not worrisome, but a lack of those effects is not a sufficient indicator you have to increase pressure.

Rather check or have someone next to you check how deep you're compressing so it's about 2-2.5 inches. It's handy to know how much that actually is. While it is a significant depth, it's also not as deep as some think. When in doubt, always err on the side of pushing too deep, but there's no inherent benefit to crushing bones and cartilage and it's also very exhausting trying to continuously push so incredibly deep.