"Fitness after forty"@en . . . . . . . . . . . . "Hal Higdon, author of the book Fitness after forty, discusses the importance of physical activity in maintaining one's health and delaying the aging process."@en . . . . . . "Side A: Hal Higdon is interviewed by Liz Dribben; William S. Paley, by Joan Martin Burke. Side B. Mary Travers is interviewed by Liz Dribben."@en . . . . . .