In this day of sky-high gas prices, walking to work can be as good for your wallet as it is for your heart. But this holiday, set aside on the first friday of April, is dedicated to highlighting the problem of obesity in America. Sponsored by the U.S. Department of Health and Human Services, this event, now in its fifth year, encourages Americans to get moving. If you live close enough to work, walk or ride a bicycle there. Instead of driving to get lunch, grab a bite somewhere you can walk to. Even taking the stairs instead of the elevator can make a big difference over time.