Taking it slowly

I've been walking for the past three or four days. It's part of this plan I found on the weight watchers website where you gradually introduce interval training into a thirty minute cardio routine. For two weeks I have to walk thirty minutes a day, and over the next twelve weeks do intervals of both walking fast and jogging. By the end of it I'll be jogging thirty minutes three times per week.
Why am I taking this so slowly now? Well, even though I was jogging longer than thirty minutes, I was not consistent. I see this as a way to slowly build exercise into my daily routine so that it becomes an important and regular part of my life. Also, this slower plan helps to build your leg muscles so that you can run without injuring yourself. And lastly, this program puts an emphasis on rest and strength training. In a few weeks I'll only be walking/jogging three days per week-the other three will be used for cycling and weights. The seventh day is for rest.
I don't know how I'll do on it because I feel like I'm not doing enough. We'll see what the scale says and how my body responds. If I don't see much difference in two or three weeks, I may need to step it up.