I just redownlaoaded the C25K app on Friday. I had it before but was to afraid to try it. Well yesterday was my first day. I made it to the half way point on W1D1 before my right leg started hurting so bad that I couldn’t go any further. I am planning on doing W1D1 until I can complete it without quitting completely. Then moving onto W1D2. How long do you all stay on a certain week before moving to the next week training?