A U.S. doctor promoting the new field of antiaging medicine said Friday in Tokyo that the public should do away with stereotypes of the elderly as sickly and unproductive and to think instead of extending life's "usable years."

"Today's 60-year-old is like yesterday's 40-year-old," Robert Goldman, chairman of the American Academy of Anti-Aging Medicine, said at a luncheon at the Foreign Correspondents' Club of Japan. "You have to think out of the box. We have to change our perception of what is old.

"You (have) got to start thinking of antiaging medicine like telecommunications. Anything will be possible over time."