As thousands of walkers prepared to pound the pavement in the American Heart Association Wall Street Heart Walk, they got some heart-y encouragement from actress and Jenny Craig spokeswoman Valerie Bertinelli. “It really is as simple as putting one foot in front of the other,” she told the crowd. “You’re literally taking steps to improve your health.” The event raised nearly $2 million for the American Heart Association and its lifesaving research to treat and prevent cardiovascular disease.