Does exercise increase serotonin levels and reduce depression?

Exercise is best. Exercise is the best biological treatment for depression and anxiety, followed by ect, then medications. Exercise increases the bdnf most. Brain derived neurotropic factors [bdnf] is what restores the hippocampus and other brain structures. Serotonin and other neurotransmitter balance is then naturally restored. Moderate exercise also helps rejuvenate almost every other organ system in the body.