The way my instructors always put it, “they aren’t getting any deader,” trying CPR and not doing it efficiently has a chance of getting some oxygen to the brain then standing by and waiting for help to arrive.

&gt;	Also, bones will break if you do it right.

This is a bit of a misconception, yes it’s very common for bones to break, especially in older folk, as their bones are brittle and you’ll feel ribs popping as you go (very disgusting sound and feeling the first time). But if bones aren’t breaking it doesn’t mean you’re doing it wrong, in younger people, especially babies who’s bones are still pliable, the sternum and ribs can recoil and deliver adequate compressions without breaking. Sometimes the popping can just be cartilage as well. I think there’s a statistic that 25% or 30% of people resuscitated will have broken or fractured sternums.