8. when performing cpr, how many chest compressions should you average per second and how many breaths do you give the victim after each set of compressions?

100 compressions a minutes then give breaths every 3-4 seconds for 30 seconds

The person who utilize the progression principle will keep adding the difficulty of the exercise that he's doing, while the person who does not, will only stay stagnant.  the person that utilize progression principle, will get a stronger endurance because now his body is conditioned to do harsher routines.{the answer was already on verified)

Iguess it you with your back