Confidence votes 15. An internet addict. You need to do 5 cycles of CPR in about 2 minutes. 2 breaths and 30 chest compressions constitutes a cycle. Chest compressions should be at a rate of about 100 compressions per minute-doing compressions in time to 'Nelly the Elephant' will be about the right speed.onfidence votes 15. An internet addict. You need to do 5 cycles of CPR in about 2 minutes. 2 breaths and 30 chest compressions constitutes a cycle. Chest compressions should be at a rate of about 100 compressions per minute-doing compressions in time to 'Nelly the Elephant' will be about the right speed.