“Laughter is a form of internal jogging. It moves your internal organs around. It enhances respiration. It is an igniter of great expectations,” according to Norman Cousins, author of "Anatomy of an Illness” published in 1979. Can a laugh a day, like an apple, keep the doctor away? William F. Fry, M.D., a pioneer in laughter research, thinks it helps. He claimed it took 10 minutes on a rowing machine for his heart rate to reach the level it would after just one minute of hearty laughter.
And who laughs more, a 4-year-old child, or a 40-year-old adult? The following article, You’re Not Laughing Enough, and That’s No Joke, discusses the surprising, or maybe not so surprising, answer.