Or if you have a porch swing, rocking chair or hammock, that’ll do the trick, too. Then spend 2 minutes swinging, rocking or swaying. The repetitive motion puts the nervous system into a more relaxed state and calms the amygdala… the brain region linked to stress and anxiety. And swinging is so powerful, the University of Miami says it can reduce the output of stress hormones by 25% for 2 hours. Just from 2 minutes of swinging, rocking or swaying.