John J. Ratey, MD, an associate clinical professor of psychiatry at Harvard Medical School and a psychiatrist at the Beth Israel-Deaconess Massachusetts Mental Health Center, both in Boston. An adjunct professor at the National Taiwan Sports University, he is the author, with Eric Hagerman, of Spark: The Revolutionary New Science of Exercise and the Brain (Little, Brown). His Web site is www.SparkingLife.org.
We have known for a long time that exercise helps keep our bodies fit. Now: More and more evidence shows…
Staying active is a key to a vigorous, healthy body as we grow older. But exercise is just as important…
