Hello, New to doing this and not in good shape but trying to get there. Started out very comfortable, tough but could complete and felt good about it afterwards. Now I have just finished week 3 and feel as if moving on to week 4 will only discourage me. I know that the 3 and 5 minute intervals will burn my lungs and my muscles terribly and make me very frustrated. In the past with frustration comes the "giving up" mindset. Any suggestions? Do many people redo weeks over? Any suggestions? I do not want to give up and repeat my sad cycle of bad habits. In my younger years I was the motivator for many people and now, uugh I can't even motivate myself. It is terribly embarrassing.