I am on week 3 now too! I thought the same thing as you and was struggling with 90 seconds. I'm proud to say I just completed Week 3 Day 2. As I look on to week 4, I can't help but have that little bit of doubt creep in about running 5 minutes straight, but I keep surprising myself, so I'm going to give it my best shot! Hang in there and see what happens! I bet you'll surprise yourself too! Good luck!