So your are convinced that you should walk, but you may still be unsure of whether you should race walk. Sure it looks a little different, but by learning to utilize more of your muscles, you will get a better workout and learn to walk faster. How much faster, the current records are:
Think of it. A world class race walker can walk 5 miles farther than a marathon at under 7 minutes a mile! While most of you don't aspire to walk that fast, shaving 5 minutes or more a mile from your workout time will save you hours per week/month.
Race walking also allows you to work out harder than pedestrian walking. The International Journal of Sports Med (1984 Apr;5(2):74-7) found that During maximal exercise, running and race walking resulted in a similar VO2 max and post-exercise blood lactic acid concentration.