When it comes to exercise, every movement counts

FOR MANY, THE PHRASE PHYSICAL ACTIVITY conjures sweaty runs or powerlifting sessions at the gym. But the latest federal guidelines support a much broader definition of what it means to be active: one that includes less obvious pursuits like taking the stairs, raking leaves and even bird-watching. This subtle shift in messaging may even help Americans live longer, experts say.

The new federal physical-activity guidelines were updated in November for the first time since 2008, and they still