The truth is is that you can.  Walking is the most basic, simple physical activity that you can do.  It may not burn the most calories, or make you elite olympian cardiovascularly fit, but for most, it does the trick.  The benefits are numerous and huge.  The more we walk, the better we feel, act and do in other areas of our lives.  So get out and walk.  Don’t circle the parking lot for 20 minutes looking for the perfect spot.  Take the further one and look at the silver lining.  Extra steps.  Anybody you know who could use a few extra steps?