Its amazing how much you can change your body's endurance in just three days of running. Week 4 was hell for me. the first 2 days SUCKED, then I did an extra day. The next two days were still tough but I was able to get through it without walking when I wasnt supposed to.
W5R1 was amazing. It seemed easier also. Every 5 minute run was a peice of cake. I'm actually excited to start day 2 now with the 8 minute run. Then.....dum dum dum.. the 20 minute run with no walks. We'll see how the next run goes for me. I can't wait.