REGULAR exercise could help lift the cloud of major depression as
effectively as an antidepressant, new research shows.

“A lot of people know from their own experience that when they exercise,
they feel better,” says James A. Blumenthal, a professor of psychology
at Duke University and lead author of the study. But such anecdotes and
gut feelings don’t amount to clinical proof. So Blumenthal conducted a
placebo-controlled clinical trial, the first time the gold standard of
research has been used to compare exercise with antidepressants for
treatment of major depression.

He sorted 202 patients into four groups. After 16 weeks, 47% of the
people who took the antidepressant Zoloft improved. But some 45% of
those who exercised in supervised groups improved, and 40% of those who
exercised on their own improved, a statistically insignificant
difference from the drug group result. About 30% of those in the placebo
group improved, a finding consistent with the placebo effect.

Exercise, Blumenthal speculates, may increase endorphin or serotonin
levels, so-called feel-good brain chemicals. The study was published in
the September 2007 issue of the journal Psychosomatic Medicine.