If you thought creating a good walking program was as easy as slipping on your sneakers, think again. Sure we've all been walking since toddlerhood, but taking advantage of walking's lifelong health benefits also means thinking about fall prevention, dressing in layers as the weather changes, even considering different walking techniques and styles. Harvard Fitness Advisor Michele Stanten, author of the Harvard Health Publishing special health report on Walking for Health, describes how to get the most out this easy, fundamental exercise routine.