Intense emotions create real physical sensations, which is why body-based interventions are so helpful in releasing those stresses. In addition to this MindBodyGreen article's tips, check out a qi gong shaking practice. Of course the amazing Yoga With Adriene has a good stress relief practice which includes "knocking on heaven's door." And if you need a very quick and very exhausting practice, just drop right into plank pose until you're pooped -- see ya, anxiety!