Hi, Thank you so much for your book, it really has changed my life! I just have a short question: The main set of the workout for phase 1, week 9, day 3 (p.160) just states "HRZ 2-3" at the beginning. Is there something missing or can I just run however long I want in that heart rate zone? I think I've also discovered a typo on page 187 (line 16) in case you want to correct that in future edition…