CNN health | It doesn’t take a lot of exercise to fight depression, study says

(CNN) – Get up and move — even small doses of physical activity, such as brisk walking, may substantially lower the risk of depression, according to a new data analysis.

“Most benefits are realized when moving from no activity to at least some,” the study authors wrote.

Recommended levels of exercise in the United States, according to the US Centers for Disease Control and Prevention, include aerobic activity at moderate levels (such as a brisk walk) for 2.5 hours a week, along with a workout of all major muscle groups twice a week.  –read more–