Medscape (11/8, Brauser) reports that, according to a 30-study review published in the November issue of the American Journal of Preventive Medicine, “even low levels of physical activity may reduce the risk of developing depression.” In fact, 25 of the “30 large studies examined in the systematic review, which included participants between the ages of 11 and 100 years” found “a ‘negative risk’…between baseline physical activity (PA) and the future development of depression.”