Miércoles 17 de Octubre de 2007, Ip nº 212

Clinical evidence is in: Exercise can fight depression
Por Susan Brink

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 issue of the journal Psychosomatic Medicine.


  17/09/2007. Los Angeles Times.