This plan, developed by the experts at Runner's World, will help you start running, by adding short bursts of running to your regular walks. At the end of this seven-week plan, you'll be able to complete 175 minutes of run/walking workouts per week, running for about twice the amount of time that you spend walking. The plan includes four workouts per week with an optional fifth day. The first workout is a 20-minute walk, and the plan builds gradually so that by the end of the program, you should be able to work out for 55 minutes - run/walking. If you don't have time for the longest workout of each week, it's okay to split it in half. If you have a BMI of more than 25, are 60 years or older, or if you'd like to take a more gradual approach, you can repeat any week.