Acclaimed actor Dick Van Dyke has remained a constant presence in American entertainment for more than seven decades. At 99, it's safe to say the Mary Poppins star knows a thing or two about living a long, fulfilling life. When asked recently about his secret to living nearly a century, he had a straightforward answer.

At 99 years old, legendary actor Dick Van Dyke is just as quick and sharp as ever. Now he’s revealing how he’s managed kept his youthful energy as he eyes tackling a second century. Appearing on the Where Everybody Knows Your Name podcast, Van Dyke broke down his exercise routine that he says has been crucial.

Barring some breakthrough in medicine, most of us probably won’t make it quite as long as Dick Van Dyke has, so it’s not that surprising that even he is having trouble believi