The Family Circle blurb had more details, but I think it got prematurely put in the recycle bin. However, I went to Jackie's site and found this:
Jackie Warner's walk/run interval workout:
I tried this at the gym on Saturday, and it kicked my butt! I am not a runner, but the running was much easier than walking on the treadmill at the maximum uphill. And doing the intervals makes the time go so fast - 20 minutes was up before I knew it. I am going to keep doing this, along with my weight loss yoga DVD, and hopefully I'll see some results.
Check out Jackie's page - she listed a bunch more fitness tips here.