The method of delivering chest compressions remains the same, as does the rate (at least 100 per minute). It is hoped that the use of compression-only delivery will increase the chances of the lay public delivering CPR.
Much like when crack your knuckles, loud popping noises from your knees are most likely caused by what is called cavitation. Cavitation results from a change in joint pressure that allows carbon dioxide, which is normally dissolved in your joint fluidâa.k.a.
Another popular way is to lie on the floor on your back with your arms out, bring one knee to your chest, and drop the knee to the opposite side of your body, rolling your hips with the movement. Gently and slowly rolling your neck from side to side can produce some audible releases which many people find comfortable.