Compression rate is between 100-120 per minute. 30 Compression, then 2 breaths. If you are alone, just do continuous compressions. Let the chest rebound completely.
Ive done CPR solo and in teams dozens of times when I was a cop. If you don't feel ribs breaking, you're doing it wrong. Period. Lock your elbows, use your upper body, not your arms. People usually let up once they feel ribs breaking because they're afraid of hurting someone. Congratulations, you feel better about yourself, but you've now going to kill them all dead because you're weak-minded.
I've successfully resuscitated an adult male with no long-term brain damage from lack of circulation after I broke 8 of his ribs doing solo compressions for several minutes while waiting for the heros to arrive. The treating cardiologist tracked me down to tell me that was the first he'd ever seen a CPR recipient NOT have brain damage in 20 years of practice.
Their life depends on you. Do it right. They deserve your best.
