Vital Signs: Meet 72-Year-Old Rollerblader Frank Hernandez

For seniors, exercise is an important way to prevent injury and retain independence. 72-year-old Frank Hernandez has an uncommon, and what he calls "addictive" way to get his cardio workouts. He straps on a pair of rollerblades and surfs the concrete waves of a skatepark in the Central Valley town of Delano.